Create a study group or get yourself an accountability buddy or coach who you check in with on a weekly basis. Could even be a friend who's not involved but whom you commit to emailing every week with an update and a goal for next week (maybe give him $100 that he'll only return if you follow through emailing every week). You can also do this via a public study log - blog, forum, etc that you update weekly or daily. Nothing is as useful as a little external social pressure and support. This seems particularly relevant in your case since you say you've tried doing this on your own before. Then, I'd combine that with actually having your schedule for those 4 months worked out, know what has to be done by when. Best of luck.
Also - read the "War of Art" by Steven Pressfield. Excellent book about resistance to hitting our goals. Indecision is simply resistance against what you know you should be doing - flipping is easier than persevering. Get a routine, make a habit of it (eg: commit to study at least 20 mins at the start of each day and continue if you get in a flow), etc.
reply