Two possibles, actually. I need at least 3 costumes for next year and the two I most want to do (pending difficulty of costumes) are:
Battlesuit Jill from Resident Evil 5.
And Harley Quinn (Arkham Asylum version).
I have a good BMI, but I need to tone up a little, especially for Jill. I'll likely be using spandex/lycra/nylon/etc. for her suit because it's for a con and I need a breathable fabric, or else I'll roast, and that type of fabric tends to cling so I need to tone up so I won't look like the Michelin Man.
My top half seems fine at the moment, it's just when you get to the navel that things go wrong (I maintain that I was made of spare parts). For Harley, I'm going to need to tone up my stomach, and my legs.
So far I'm just trying to watch what I eat but I hope to maybe join a gym after new year (I figured there's no point in starting to excercise at this time of year...Christmas dinner will reverse all my hard work >.<). I did a little Tae Bo last year and it was a good work out so I think I'm going to try to do that regularly.
I'm a little restricted by the exercise that I do because I have trouble with my wrist so I'm not sure how I will react to Tae Bo now lol.