For the most part, Artifacts are made to fit into any deck. Whatever you've built, there's likely an artifact out there that can help you run it more smoothly.
Example #1: Sun Droplet and Well of Lost Dreams, which respectively function as life preserver and draw engine in several Life Gain decks:
|Example #2: Bonesplitter, an excellent addition to any deck of 1/1 and 2/2 creatures:|
|In the Shards of Alara block, however, M:TG introduced artifacts with actual colored mana costs (mostly for White/Blue/Black, White/Blue, Blue/Black, and White/Black). These still count as artifacts, but you just have to pay certain colors of mana to get them instead of any type of mana like other artifacts.|
I have seen people build decks strictly made of artifacts and win; there's a winning little deck built around the Artifact Creature Arcbound Ravager, for example. I have also seen artifacts used as merely enhancements for a mono- or dual-color deck. (My White/Green Test of Endurance deck, for instance, just wouldn't be the same without Isochron Scepter...it makes for the fun trick called "Scepter-Fog.") Experiment with adding a few artifacts into your deck, and see if you enjoy it--it certainly can't hurt!