If you're getting a 149 on practices, i STRONGLY urge you to take a prep class or really really really hit the books. I don't often advocate a prep class, but in your case I think it would really help. It's great that you've already taken a pratice test. You have plenty of time to prep to get your score up- it's not that hard to do! Learning the tricks and how to think things through (like the logic games) can dramatically increase your score.
Unless you have a 4.0 GPA and a list of great experiences and other stuff like that, you really need to get that up.
Most schools have a formula that weights the two into one score (each school has their own formula). This will determine who automatically gets in, who's a maybe, and who's a probably-not-unless- there's-something-else-really-fantastic-about-them. So the LSAT really is a large factor.
Also, with the economy as sh!tty as it is, there's a lot more people who want to go to law school, thus increasing the competition. You want to make yourself into the best "package" possible.
If you have any other questions, feel free to PM me!