1) Buy this book immediately, rush delivery. The Eight Secrets of Top Exam Performance in Law School, by Professor Charles E. Whitebread.
I'm not kidding at all. Do it now, read it immediately cover to cover, its like 90 pages, you can do it in an hour. That book was a significant factor in why I was #1 in my 1L class first semester. I didn't read it until a few days before my first exam.
2) Break it into sub-issues and keep it linear. This isn't poetry or an essay. It can read repetitive and boring. What it cannot be is meandering or disorganized. Don't make the professor search for points. Hand them to him or her on a platter.
So, you go like this.
The first issue is breach of contract between A and B.
In order for there to be a contract, there must be an offer, acceptance, and valid consideration.
The first sub-issue is whether there was an offer. An offer is blah blah blah. On the one hand, blah. On the other hand, blah. Here, because A blah (bonus points - and because A didn't withdraw the offer), there was an offer.
The next sub-issue is whether there was proper acceptance. Acceptance is blah blah blah. Here, because B blah, there was acceptance.
The next sub-issue is whether there was adequate consideration. Consideration is blah. Here, because A blah and B blah, there was mutuality of obligation (or whatever the rule is, its been years since my K exam) and therefore adequate consideration. (Bonus points - Moreover, courts will generally not inquire into adequacy of consideration, as a peppercorn can be enough. Cite.)
Because there was a valid offer, acceptance, and consideration, the contract is valid and enforceable.
The next sub-issue is breach.........and so forth.
Linear. Each paragraph relates to ONE sub issue. Be disciplined and don't stray. Break it down into elements and IRAC each element. Yes, I said IRAC, and I meant it.
Edited because I suck at spelling.