Water is an important element for birds in your backyard. One solution is to provide a simple birdbath you can purchase at your local nursery or hardware store. But if you really want to attract birds, running or dripping water always works. There are simple pumps or misters you can install in your birdbath. These can also be purchased at local nurseries or hardware stores. Misters can also be used alone. Hummingbirds love to fly through a fine mist, but the larger birds prefer the birdbaths. If you choose to use a birdbath, you will need to clean and refresh the water about every three days (depending on weather conditions). If you want to go all out, building a small pond with shallow areas and a waterfall or mister will work great.
Helpful Links to More Information
What bird feeder is best for my yard? What seed should I be providing to birds? - From the Cornel Lab of Ornithology
Bird Feeding Basics - From Hilton Pond Center
Feeding Wild Birds - From WildBirds.com