I didn't do well enough on the LSAT to get into the schools I'd like to attend...thats the simple answer.
The longer answer is that I applied really late in the cycle, so I didn't even make the deadlines for the schools I'd want to go to (I was having personal issues during the early season). I know I can do better, and I feel that I owe it to myself to try. I'm also just not ready to start law school in the fall. It would be too much stress too soon, and I know that I'm just not ready for that. It was very difficult for me to admit that to myself, though. What made it easier, was the fact that I found a job very quickly, so I know I won't be floating at all. The time off will help me figure myself out enough to be ready for law school when I do finally make it there. It was the all around best decision.
I'm in the same boat as far as LORs go though. I don't really have any more people that I could ask for them (although I might be able to swing a couple, I just don't know if they would be any more effective than the ones that I already have--I might get them just so I can have different ones to send to the schools I'm reapplying to).
Good luck if you decide to take the year off!