How do you get motivated?

How dose one get "Motivation" (The general desire or willingness of someone to do something). I am wondering this because i have nothing in my life to look forward to no "Motivation" i cant just get off my ass and do something. I cant do anything crazy because i'm not going to graduate high school (Because i have no "motivation" so i don't do anything in school.) so i'm just wondering if anyone knows a way i could get "motivated"? thanks.....

It is a personal desire If you don't not have the motivation to so call do anything then what are you doing.