My technique is a bit boring but it works... I have yet to master anything beyond beige...
I buy a lot of eyeshadow only to find it doesn't look right on me. I have sleepy eyes and a small face. Usually I end up looking like a raccoon. To brighten my eyes and look more "awake" I put foundation and/or powder over my whole eye. Then blush on the crease and below and a white highlighter under the outer brow. It does work and uses makeup I already have... not much fun, but it does the trick... just be careful on the shade of blush. I have light skin with yellow undertones. The blush I use is more peach than pink. I used a pink a few times and looked sickly instead.
Also, I only put mascara on top lashes and use gray (day) and black or dark brown (night) shadow as liner, again on top lashes only.
I did take a makeup lesson at a salon and the only useful thing I learned was white or light highlighter under the outer brow and wiggle your mascara wand while applying to help separate the lashs. On The Tyra Show they claim this also helps deposit more macara at the base of your lashes and can sustitute for liner. I don't like a lot of mascara near my eye because it bothers me, so I haven't fully explored this technique.
Highlighter under the brow was advised to me when I wore glasses, but works just as well without.... they did caution that you must have well-groomed brows to do this because it calls attention to them.