I was in exactly the same situation! I'm a REAL perfectionist which actually means I'm prone to procrastinate loads because I never want to work until I'm totally focused on it and can do it perfectly (which never happens...)
I have 3 tips that helped me:
1) Make your study space somewhere you REALLY WANT TO STUDY! I never studied previously because I hated my work space, it was so boring and empty! But I dressed it up! I cleaned my dressing table to use it as a desk, I printed off some motivational quotes and stuck them on my wall, bought a tiny cactus, bought a candle and now I have a space that I LOVE being in! It makes me want to study because I'm in such a happy mood around my desk.
2) If you can't focus at home, go to a library or a coffee shop. It's easier for me to focus when I'm in a situation in which other people are around me but fairly quiet, I'm happy and comfortable.
3) This one was the one that really, really got me started. You know the website tumblr? There are different 'communities' on Tumblr, where tumblrs with specific themes follow each other and stuff. And there's a community called studyblr! I started a studyblr and on it I follow other studyblrs who reblog pictures of work, desks, study tips etc and it got me so motivated! Start your own, it's so worth it! Mine is here: trabajadora.tumblr.com
Just remember: you are a person who can do ANYTHING that they wish. As a human, you have the ability to fullfil any dream that you have, but the ONLY way you can do that is by getting your ass in gear and working and focusing!
Furthermore, if you put the work in now, I CANNOT express how happy you will be on results day. I put the work in, and I came out with 9A*s and 2As, one of the highest results sets my school has seen in its history. While everyone around me was crying because they didn't do as well as they wanted to because they didn't work as hard as they should have, I was in the corner crying because I was so overwhelmed and surprised and ecstatic with how well I had done.
I'll finish with my favourite studyspo quote: "The secret to getting ahead is getting started"