Is your school about to get out for summer vacation? I use to get like that right before summer vacation every year. Unfourtantley this whole year has been like that do to a lovely case of senioritis.

But like Court_Knee said music helps I usually listen to music when I do homework.

Or setting aside a special place just for homework and studying helps too. My kitchen table is my study spot so I know when I sit down there that it's study time and it really helps me concentrate.

Good luck and a job is way diffrent then school...mostly because they pay you at work..espically if you waitress you won't slack off because if you do there goes your tip!!