Learning Dimensioning and Tolerances

[Madison]

I'm going to be in the market for a job again very soon and would like to do some more CAD and design work if I can find it. I'm always very self-conscious about applying for these jobs, however, because my knowledge of dimensioning and tolerances is terrible. All of the design and CAD work I've done for FIRST led to parts that I was manufacturing myself, so critical attention to proper standards wasn't necessary.

What are good resources for learning more about proper methods for dimensioning of drawings? I don't expect that there's anything available online, but if there's anything, I'd love to see it. I'm also interested in books you may have used, standards guides and rules of thumb that might help me to seem a bit less like an idiot should I pursue something like this.

Thanks.