I had no clue about a lot of things when I started riding. It's a wonder I didn't have a flat for 3 years, because I never carried a tube or a pump- I didn't know any better and it was dumb luck that I never got stranded.

I've learned a lot from others in group rides, but the mechanical lessons I've learned from free LBS clinics have been invaluable. There is a big difference between having the tools and know how and when to use them!