Yess!!!!!
Motivation is really what keeps me from burning out throughout the year, although it's really hard to maintain it
( When I'm faced with tedium and get sick of a particular subject I just keep telling myself 'if you think about it, you'll just have to do this later anyways' to try and guilt trip myself into actually doing the work - it really works when you hypothesise the amount of stress and frustration you'll have to go through later!! although I don't keep a diary, I still write out a list of things I want to accomplish by the end of the day on a piece of paper, or on reminders on mac. it helps me visualise the amount of things that I have to do!
study buddiesIf you find that you're not achieving anything at home and end up procrastinating/looking at facebook every 10 minutes, it's a great idea to go and study at your local library!! grab a study buddy as well: contrary to what a lot of people assume, study buddies will not distract you - they only will if you let them! Seeing a friend study will also motivate you to study, and if you guys do the same subjects it's even better.. you can see what things they've done as a source of motivation AND, in the study session you guys can help each other out!
Rewarding yourself is also another really helpful way of motivation .. I often go to the library straight after school and stay there till around 8pm. I go home, have dinner... and do absolutely nothing, surf youtube, catch up with episodes etccc. The 4/5 hours after school of straight studying at the library can help you achieve so much and the hours will fly by very quickly so it won't seem like heavy studying at all
hope this helped!