I want to do the same (not suck at it) so i started to look at web design communities a while ago. I found some interesting things that helped me be a little better:

- http://webtypography.net/ for typography basics

- http://uxmovement.com/ for general user experience advice

- http://uxmovement.com/resources/4-best-design-pattern-librar... (inspiration :) )

- http://alpha.patterntap.com/collections/Tabs (found recently about it).

- http://www.blog.spoongraphics.co.uk/articles/25-classic-font...

Hope it helps.