While playing, just press "~" to bring up the console, write "player->[command]" and press "Enter". [command] is one of the items listed below.

Example of usage: 'player->AddItem "Gold_100" 12345' will add 12345 of gold to player.

Code - Result
TMG - God Mode
Help - List of All Debugging Commands
SetFlying 1 - Fly Mode
SetSuperJump 1 - Super Jumping Mode
SetWaterWalking 1 - Walk on Water Mode
SetWaterBreathing 1 - Breathe Under Water
SetLevel [level] - Sets Player Level to [level]
AddItem "Gold_100" [gold] - Adds Gold to Player where [gold] = amount
SetFatigue [fatigue] - Sets Player Max Fatigue to [fatigue]
SetMagicka [magic] - Sets Player Max Magic to [magic]
SetHealth [health] - Sets Player Health to [health]


Other Commands
The full list of debugging commands (shown with "player->Help").
Format is [command]-[command description]:

ToggleScripts-toggle scripts
TestInteriorCells-start interior cell test
TestCells-start exterior cell test
FixMe-Fix Me
TFOW-toggle fog of war
MOTO-move one to one
TWF-toggle wireframe
TWA-toggle water
TVM-toggle vanity mode
TTS-toggle texture string
TST-toggle stats
TSO-toggle script output
TPG-toggle path grid display
TMS-toggle magic stats
TLF-toggle load fade
TKS-toggle kill stats
TGM-toggle god mode
TDT-toggle debug text
TDS-toggle dialog stats
TFH-toggle full help
TCS-toggle combat stats
TCL-toggle collision
TCG-toggle collision grid
TCB-toggle collision boxes
TAI-toggle AI
T3D-test models
SSG-show scene graph
SCT-stop cell test
ORI-output reference info
TW-toggle world
TS-toggle sky
TM-toggle menus
TL-toggle lights
TG-toggle grid
TB-toggle borders
SV-show variables
ST-show targetsv SG-show group
SA-show animation
RA-reset actors
PT-purge textures

The full list of commands that can be used in 'player->[command]' pattern:

PayFineThief
GetSoundPlaying
ModInvisibile
SetInvisibile
GetInvisibile
ModParalysis
SetParalysis
GetParalysis
ModBlindness
SetBlindness
GetBlindness
ModSilencev SetSilence
GetSilence
ModCastPenalty
SetCastPenalty
GetCastPenalty
ModArmorBonus
SetArmorBonus
GetArmorBonus
ModFlying
SetFlying
GetFlying
ModSuperJump
SetSuperJump
GetSuperJump
ModSwimSpeed
SetSwimSpeed
GetSwimSpeed
ModWaterWalking
SetWaterWalking
GetWaterWalking
ModWaterBreathing
SetWaterBreathing
GetWaterBreathing
Fall
GetForceSneak
ClearForceSneak
ForceSneak
GetLocked
EnableStatReviewMenu
DontSaveObject
GetPlayerMagicDisabled
DisablePlayerMagic
EnablePlayerMagic
GetPlayerFightingDisabled
DisablePlayerFighting
EnablePlayerFighting
EnableLevelupMenu
GetLevel
SetLevel
PlayBink
GetHealthGetRatio
GetFactionReaction
ShowMap
StopSound
GetTarget
PayFine
GetDetected
GetVanityModeDisabled
DisableVanityMode
EnableVanityMode
GetBlightDisease
GetCommonDisease
GetAttacked
GetSecundaPhase
GetMasserPhase
FadeTo
GetPlayerLookingDisabled
DisablePlayerLooking
EnablePlayerLooking
GetPlayerJumpingDisabled
DisablePlayerJumping
EnablePlayerJumping
PCGet3rdPerson
PCForce1stPerson
PCForce3rdPerson
PCJoinFaction
XBox
GetRace
GetEffect
Unlock
Lock
HurtStandingActor
ModCurrentFatigue
ModCurrentMagicka
ModCurrentHealth
FadeIn
FadeOut
PlayLoopSound3DVP
PlayLoopSound3D
PlaySound3DVP
PlaySound3D
PlaySoundVP
COE
CenterOnExterior
EnableBirthMenu
EnableClassMenu
EnableRaceMenu
EnableNameMenu
ModRegion
ChangeWeather
Cast
RemoveEffects
GetSpellEffects
RemoveSpellEffects
GetSpell
RemoveSpell
AddSpell
SayDone
Say
EnableMagicMenu
EnableMapMenu
EnableInventoryMenu
EnableStatsMenu
HitAttemptOnMe
HitOnMe
GetStandingActor
GetStandingPC
GetPCCell
ModFactionReaction
SetFactionReaction
RepairedOnMe
GetPCRank
GetInterior
ModHello
SetHello
GetHello
ModAlarm
SetAlarm
GetAlarm
ModFlee
SetFlee
GetFlee
ModFight
SetFight
GetFight
GetDeadCount
GetItemCount
GetLOS
GetLineOfSight
GetAIPackageDone
GetCurrentAIPackage
AIWander
AITravel
AIFollowCell
AIFollow
AIEscortCell
AIEscort
AIActivate
OnMurder
OnKnockout
OnDeath
DisableTeleporting
EnableTeleporting
DropSoulGem
RemoveSoulGem
AddSoulGem
HasSoulGem
GoToJail
ForceGreeting
Resurrect
PlaceAtPC
ShowRestMenu
GetPlayerViewSwitch
DisablePlayerViewSwitch
EnablePlayerViewSwitch
WakeUpPC
GetPCSleep
GetPlayerControlsDisabled
DisablePlayerControls
EnablePlayerControls
GetDisabled
Disable
Enable
ModPCFacRep
SetPCFacRep
GetPCFacRep
COC
CenterOnCell
RemoveItem
AddItem
PCClearExpelled
PCExpell
PCLowerRank
PCRaiseRank
LowerRank
RaiseRank
GetJournalIndex
ClearInfoActor
ModResistNormalWeapons
SetResistNormalWeapons
GetResistNormalWeapons
ModChameleon
SetChameleon
GetChameleon
ModResistParalysis
SetResistParalysis
GetResistParalysis
ModResistPoison
SetResistPoison
GetResistPoison
ModResistCorprus
SetResistCorprus
GetResistCorprus
ModResistBlight
SetResistBlight
GetResistBlight
ModResistDisease
SetResistDisease
GetResistDisease
ModResistShock
SetResistShock
GetResistShock
ModResistFrost
SetResistFrost
GetResistFrost
ModResistFire
SetResistFire
GetResistFire
ModResistMagicka
SetResistMagicka
GetResistMagicka
ModDefendBonus
SetDefendBonus
GetDefendBonus
ModAttackBonus
SetAttackBonus
GetAttackBonus
GetCurrentWeather
GetWindSpeed
PCExpelled
SameFaction
ModPCCrimeLevel
SetPCCrimeLevel
GetPCCrimeLevel
ModDisposition
SetDisposition
GetDisposition
ModReputation
SetReputation
GetReputation
ModFatigue
SetFatigue
GetFatigue
ModMagicka
SetMagicka
GetMagicka
ModHealth
SetHealth
GetHealth
ModHandToHand
SetHandToHand
GetHandToHand
ModSpeechcraft
SetSpeechcraft
GetSpeechcraft
ModMercantile
SetMercantile
GetMercantile
ModMarksman
SetMarksman
GetMarksman
ModShortBlade
SetShortBlade
GetShortBlade
ModLightArmor
SetLightArmor
GetLightArmor
ModAcrobatics
SetAcrobatics
GetAcrobatics
ModSneak
SetSneak
GetSneak
ModSecurity
SetSecurity
GetSecurity
ModUnarmored
SetUnarmored
GetUnarmored
ModAlchemy
SetAlchemy
GetAlchemy
ModRestoration
SetRestoration
GetRestoration
ModMysticism
SetMysticism
GetMysticism
ModConjuration
SetConjuration
GetConjuration
ModIllusion
SetIllusion
GetIllusion
ModAlteration
SetAlteration
GetAlteration
ModDestruction
SetDestruction
GetDestruction
ModEnchant
SetEnchant
GetEnchant
ModAthletics
SetAthletics
GetAthletics
ModSpear
SetSpear
GetSpear
ModAxe
SetAxe
GetAxe
ModLongBlade
SetLongBlade
GetLongBlade
ModBluntWeapon
SetBluntWeapon
GetBluntWeapon
ModHeavyArmor
SetHeavyArmor
GetHeavyArmor
ModMediumArmor
SetMediumArmor
GetMediumArmor
ModArmorer
SetArmorer
GetArmorer
ModBlock
SetBlock
GetBlock
ModLuck
SetLuck
GetLuck
ModPersonality
SetPersonality
GetPersonality
ModEndurance
SetEndurance
GetEndurance
ModSpeed
SetSpeed
GetSpeed
ModAgility
SetAgility
GetAgility
ModWillpower
SetWillpower
GetWillpower
ModIntelligence
SetIntelligence
GetIntelligence
ModStrength
SetStrength
GetStrength
AddTopic
Random
MenuMode
CellChanged
GetButtonPressed
ScriptRunning
StopScript
StartScript
StopCombat
StartCombat
OnActivate
SkipAnim
LoopGroup
PlayGroup
CellUpdate
GetSecondsPassed
GetCurrentTime
SetAtStart
GetStartingAngle
GetStartingPos
SetAngle
GetAngle
SetPos
GetPos
RotateWorld
MoveWorld
Rotate
Move
PositionCell
Position
StreamMusic
PlaySound
GetDistance
MessageBox
OutputObjCounts
OutputRefCounts
EnableRest
FillMap
FillJournal