While playing a game, press ~ to display the console window. Type "player-" followed by one of the following codes to activate the corresponding cheat function. For example, type "player-togglegodmode" to toggle god mode.
Result
Cheat Code
Set player level setlevel [number]

Set maximum fatigue value setfatigue [number]

Set maximum magic value setmagicka [number]

Set player health sethealth [number]

Set abilities and skills set[ability or skill] [number]

Set endurance skill setendurance [number]

Set agility skill setagility [number]

Set will power skill setwillpower [number]

Set intelligence skill setintelligence [number]

Set strength skill setstrength [number]

Add indicated amount of gold additem gold_100 [number]

Spawn indicated item additem [item name] [amount]

Place character in the named cell centeroncell [cell ID] or coc [cell ID]

Place character in the exterior cell grid
centeronexterior [x,y] or coe [x,y]

Create map image file for Xbox createmaps ["filename.esp"]

Add all entries to journal; takes a long time
filljournal
Show all the towns on world map fillmap

Jump 128 units away from current location
fixme
Get faction reaction getfactionreaction [faction ID faction ID]

Flight mode setflying 1

Super jumps setsuperjump 1

Walk on water setwaterwalking 1

Breathe underwater setwaterbreathing 1

Show shorthand for most commands help

Set speed setspeed [number]

Show variables showvars or sv

Stop cell test stopcelltest or sct

Test cells testcells or tc

Test interior cells testinteriorcells or tic

Test models testmodels or t3d

Toggle AI toggleai or ta

Toggle borders toggleborders or tb

Toggle combat statistics togglecombatstats or tcs

Toggle collisions togglecollision or tcl

Toggle collision boxes togglecollisionboxes or tcb

Toggle collision grid togglecollisiongrid or tcg

Toggle debug text toggledebugtext or tdt

Toggle dialogue statistics toggledialoguestats or tds

Toggle fog of war togglefogofwar or tfow

Show ownership and script name togglefullhelp or tfh

Toggle God mode togglegodmode or tgm

Toggle grid togglegrid or tg

Toggle kill statistics togglekillstats or tks

Toggle load fade toggleloadfade

Toggle magic statistics togglemagicstats or tms

Toggle menus togglemenus or tm

Toggle scripts togglescripts

Toggle stats togglestats or tst

Toggle sky...