Learned more today than I ever thought...

[OakLeaf]

If you have Shimano components, they have installation and adjustment instructions for all their components on their website.

And Sheldon Brown's site, although much of it is dated. RIP.

[brewer]

I like the online resources, but sometimes it's also useful to have a book in hand. I use and recommend Zinn and the Art of Road Bike Maintenance (there's also a mountain bike-specific version). I find his blown-apart drawings and writing style to be very helpful.

I also ask lots of questions at our LBS.

...oh, and Malkin bought me the most fab bag of tools for my birthday.

Cheers!