I'm an attorney - or at least I graduated from law school. Now I'm mostly a mom of three kids and an Army wife. Sometimes I practice, sometimes I don't - it all depends on where we live and how long we are going to be there and I don't practice anything flashy or Perry Mason but I keep my foot in the door. I'd bet money there would be some who'd say my legal education was being wasted right now. I don't think it is - it's just dormant while I wait for my turn.
Sometimes it takes years to see the bigger picture and you never know what life is going to hand you.
An education never goes to waste. If you read and look around on this board and in the news you'll see that those in the military and even in SF are getting targeted on a more frequent basis for their actions in the sandbox and beyond. A "sheepdog lawyer" is becoming more necessary for them. Typical lawyers, even JAG lawyers, are failing them. Even if you don't become JAG - just knowing what is and isn't legal in the US and with various international conventions is looking to become awfully critical now and in the future. Like Magician said, this war isn't going anywhere.
Do some research and reading, and see if you can get some directed reading, independent or self-study credits for research in this area. Heck, you might even get yourself published because this area is very newsworthy. There are a number of threads on this if you look. There are also a number of books out there that would give you a good start. When law school got a little dry for me toward my third year I invented my own directed reading curriculum with the help of some very cooperative professors. Get creative and find some good material and proposals and you can do the same. There are threads on some great books already, but I'm reading Combat Self-Defense by David Bolgiano based on a board recommendation and it's got a wealth of reseach possibities in it. You can also pick up the Servicemembers Legal Guide by LTC Jonathan Tomes for a general overview of military justice that might lead you in some interesting directions.
Additionally, there is a wealth of information on this board that could lead you in very interesting research areas by just watching the board and poking around it. There are at least two lawyers on here (Roguish Lawyer and AirborneLawyer) that are incredibly impressive in their knowledge and experience and you should just read every post they've made and I'm sure you'll find some massively good stuff floating that could lead you in some cool directions. If you make these last two years of law school your own - it'll be a lot more interesting and stand you in good stead for whatever you have in store down the road. But don't take sliding-on-by classes because you are bored with school, it'll just make the problem worse.
But finish and like RL said - get good grades.
AND TAKE THE BAR RIGHT AFTERWARDS!! I took it right afterwards in one state and three years later in another and it was monumentally harder the second time around for a bunch of reasons.