Maybe I'll elaborate a little on books written by Śniatycki and Woodhouse, because these are the ones that I've read (or rather gave up trying).
At first I picked Woodhouse, but I had to stop, probably due to weakness of my geometrical background at the time. For me, it was rather dry and I don't remember seeing there even one example completely worked out.
In the preface of Śniatycki's book it is written that its aim is performing actual computations (or something like that; I don't have it at hand). So I went the extra mile and struggled with it for a while, getting almost to the end. It was quite hard, but the reward waiting for me, a bunch of thoroughly examined examples (although I was forced to provide some details, but mainly because I wasn't aware of some standard techniques), was worth it.
It is also definitely not a bad idea to search homepage of John Baez; I remember that there are some resources concerning this topic.