The best way to remember this answer is by remembering the word SILVER. S (Well this word is just to make up the word , you can just skip this.) I (Init) L (Load) V (Validate) E (Event) R (Render)
SILVER right Best example from Shivprashad
Init,Page load,Page render,Page unload
Page_PreInitPage_InitPage_InitCompletePage_PreLoadPage_LoadPage_LoadCompletePage_PreRenderPage_PreRenderCompletePage_SaveStateCompleteRenderUnload
http://www.tutorialspoint.com/asp.net/asp.net_life_cycle.htm