When you have little things to look forward to it makes the task much easier to tackle

The way I use incentives is simply to set myself little goals throughout the day. For example, Ill tell myself that Im allowed to watch an episode of Friends if I study straight for the next three hours without procrastinating.
Or Ill tell myself that if I study hard for the next few hours before dinner, Ill feel great about the effort Ive put in and feel no guilt in sitting down to a nice dinner and relaxing for an hour or so.
These small incentives work really well for me, especially when Im putting in more study hours for upcoming exams.