The Bottom Lash TrickDon't apply mascara to your bottom lashes. Instead, curl upper lashes and then apply a couple coats of thickening mascara. Curling lashes always makes eyes pop.
For more tips on mascara application, check out 15 Mascara Tips and Tricks.
The Upper Lid TrickMakeup artists suggest keeping eyeliner to the upper lid only. A liquid liner stays better than pencils. You can practice curving the line up on the outer corners of eyes to "lift" them. Avoid thick, heavy lines, however.
I am a believer in rule-breaking however, so I think you can go ahead and line the bottom lashes, just skip the liquid liner and try a pencil instead making sure to smudge it with your finger. Charla Krupp, the author of "How Not to Look Old" warns against lining the inside of the eyes. Your eyes will look beady if you do it (my mom used to do this and it drove me crazy).
For more eyeliner tricks and secrets, see How to Apply Eyeliner.
The Shimmer DilemmaShimmer can be your worst enemy because shimmery eyeshadows only highlight crow's feet. The one area they work in is the inside corner of the eye. Apply a dot of shimmery light eyeshadow in the instead corner of the eye to make eyes pop.
For more fun eyeshadow tips, see 10 Eyeshadow Tricks I Wish I Knew Years Ago.
The "Less is More" RuleWhen you have a saggy upper lid, no need to go all out with several different colors of eyeshadow. Instead, keep eyeshadow in place all day with an eyeshadow primer, then apply a couple sweeps of a light eyeshadow that's flattering to your skin color. Skip the bright, crazy colors.
I recommend primers in How to Keep Your Eyeshadow in Place for Hours.