Check out this great thread by Prof. Rachel Gurvich (UNC), posted Saturday morning.
And here's a thread started by Prof. Justin Murray (NYLS), also posted Saturday.
Again and again, people advise you to practice using past exams. And where can you find past exams? In a Google drive linked from the Law Library's home page (look under "Find It").
Note: If you click on the link and it defaults to your gmail address, click to change accounts and put in your _____@uw.edu address. Then you'll be asked for your UW NetID and password and you'll be in.
If your professors don't have any exams posted, it might be that they just haven't gotten around to sending them to the library. You can politely remind them (but of course respect their decision not to post, if that's why they haven't sent any in).
Lawprofblawg, an anonymous blogger and Twitter star (at least in my community) offers a comic (yet on-point) view of exam prep: Truths About Final Exam Time, Above the Law (Dec. 1, 2015). Lawprofblawg explains how students often go wrong: 9 Mistakes You Probably Made on Your Law School Final Exams, Above the Law (May 10, 2016).
And finally, as lawprofblawg tweeted last spring:
"Writing a final exam answer is like building Ikea furniture. It's vitally important you read the directions more than once."