Last week, I tried my hand at singletrack for the first time. It was with a LBS group and was SUPPOSEDLY a beginner's ride, but I found it to be very technically difficult. To make a long story short, I crashed four times and accumulated quite a number of cuts, scrapes and bruises. I don't want to throw in the towel, but I'm not ready to head out onto that kind of terrain until I feel a little more confident about how to turn through lots of switchbacks, "choose a line", and pick up speed without being terrified that I'm going to run into a tree and kill myself. I was hoping the guys from the LBS would offer advice, but no. They just said, "Are you okay?" and continued on. (Oh, well.)

Are there any helpful videos or books you'd recommend I check out? I really want to improve my bike handling skills. I'm not trying to be any kind of expert--I prefer riding road, anyway--I just want to have fun without getting bloody.