Winter workout goals

A couple weeks ago, I sat down and officially wrote all of my workout goals for the winter. Some of them are pretty lofty. One is to be able to do a pullup, unassissted. I think that is so bad ass. My brother helped me put together a workout plan to focus on training the important pullup muscles - back, biceps, triceps, shoulders, and as a side note, forearms, abs and grip strength. For the last two weeks, I've been practicing "hanging around" at the gym. I will hang from a pullup bar and then do ab work. It turns out I have almost no grip strength! Something tells me that lack of grip strength will be impeding my pullup goals progress...