[brk]

I've always found the best way is to set out to build something, and then Google all the various little bits along the way.

Scratch out your rough website design on paper and figure out the important components. Do you need to handle user logins? Scrape data? Display funny pictures of cats?

Take each core function and google around for similar examples, look at sites like miniajax.com and so on for sample code and go from there.