If you want to go to college you will like to have more choices when the time comes. If your grades are lousy you won't be able to get into the bigger better or more selective schools. If you do well enough you can get your college paid for. There are so many scholarships available. And smart people are more attractive!
My motivation, especially on vacations and long weekends is to get it done early, so that I can just forget about it and won't be spending hours trying to finish it on the Sunday before it's due. Hope this helps! :D
Buy a bag of gummy bears (or some other treat you like) and lay them on your homework so that each gummy bear comes after one question. For every question you answer, eat a gummy bear. You get no gummy bears until you finish a question. If you finish the entire sheet, eat all the gummy bears left over. Don't cheat! Also this wouldn't really work for an essay but I'm sure you could find a way to make it work.
If you don't do it now you will pay later, our world is base on ecosystem a circle the goes round and is bound to repeat. your world is a scale if you put more on one it will become unbalance. easier said karma is a bitch! just do the work and get pay later on instead of punish!