For those of you looking to get into shape fast, kettlebells are a great way to go. I've been exercising with them for years, and they work! For those of you who need a little geek motivation to get you going, I suggest that you watch the movie 300, and then get yourself a zombie head kettlebell! There's nothing like working out with a 35lb iron zombie head!
Then if you don't like it, or you get lazy, at least you will have a steel zombie head decoration sitting in the corner of your room.
They are available in sizes ranging from 18lbs to 72lbs. They’re made from chip resistant iron and balanced perfectly for swings and lifts. You can find more details here.