Just ask yourself why you (might) want to be a lawyer. If it's because you can't think of anything better to do or just because you want to make a lot of money, then you should reconsider (at least, unless you have good reason to anticipate admission to a top law school). If there's something you need to be a lawyer to do, or something about the practice or teaching of law that especially appeals to you, then go for it.
A year or two in "the real world" might help clarify your thoughts.
I'll second this. Law school is not for the faint of heart. It is grueling, cut-throat and challenging. If you are not passionate about the practice of law, then rethink this route.
I recall some reports that state that law school applications increase during times of economic turmoil. Realize you will have plenty of competition if you go. That's competition for grades as well as for fewer jobs.
However, if you feel strongly about this career move and are flexible, this could be your thing. Some areas have a higher demand for jobs than others. Nevada is a notoriously great job market for attorneys (one of the reasons I moved here - I was turning down
interviews, let alone offers). The caveat is Nevada pays about half what you'll make in BigLaw in a major city (LA, NY, etc.).
IP is a great field that is always in demand and pays well. If you have the credentials (hard science undergrad degree) then you can make a go of it. Patent prosecution can be boring from what I've been told (I worked at a firm that did some IP work and the IP partner and I chatted a bit about this). IP litigation on the other hand can be very interesting (this same partner was recently in Korea for depositions). Find what you like and certainly do as much research on this prior to setting off. Good luck.