One tip that can keep your hands from looking older than their years, is to apply a hand creme with at least SPF 15 every day.
Also, look for products that contain hydroquinone or vitamin C...they will help lighten spots caused by the sun over time.
A good idea is to use a lightweight serum, like Clinique Even Better Skin Tone Corrector ($40 nordstrom) which has the vitamin C derivative.
Use the serum during the day under your sun screen, or at night on clean hands. For extra oomph, use the serum under your hand creme at night too.
Reduce medicine cabinet clutter by using a face creme on your hands too. Look for ones that contain retinols, peptides, and alpha hydroxy acids.
Basically, the school of thought is...if it'll work on your face, it'll work on your hands.
A good one to try is Roc Retinol Active Pur ($16.99 drugstore.com).
Just make sure to apply a sunscreen to your hands if you go out during the day, especially if your cream does not contain it..use of these products may increase your skin's sensitivity to the sun.
photo courtesy of drugstore.com
info courtesy of instyle magazine