I did it with Cat 5 and ends from Lowe's. Wired through attic to living room and did an outlet there. Real easy. Punching down the female outlets is harder than the male cable ends, but is still easy. Just be patient, and don't cut to short in case you have to cut off the end and repunch or recrimp.
Buy non-plenum CAT-5. Much cheaper. Ask for it or they might steer you to the plenum CAT-5. If you're doing indoor, non-plenum is fine.
When you run lines, try not to run them in proximity of your electrical lines in the walls. I ran my parallel to the cable coax in the walls, and used the coax/CAT-5 dual outlet plates.
Buy twice as much cable as you think you need, or else on your longest run, you'll find that you're about a foot short.. :-)
Do a search.. lots of tips on how to crimp ends, crossover vs. straight, etc.
Punxsutawney Jesus, Illuminati Elitist