From my research thus far, here's a few of my favorite lip DIYs and tutorials:
A guide to lipstick shades from Liz at Cotton & Curls
How to prep your lips for the perfect lipstick from Stephanie at Henry Happened
Another Henry Happened favorite, this time a great list of lipstick tutorials and colors
An awesome red lips tutorial video
And of course, I have to give a shout-out to one of my old college friends, who just started a beauty Tumblr. She is not one to shy away from drama (she is an actress after all), so her lipstick choices are always spot-on.