Depends on what you want it to do. Swords Dance is an all-around useful skill for Scizor, and Wing Attack is less so (unless you're deathly afraid of Heracross, and is completely outclassed by Aerial Ace anyway). False Swipe is obviously for catching pokemon, and Scizor is one of the best users of it, but lacks status moves (particularly Yawn, Sing, or Thunder Wave) to back it up. Scizor also has access to a nice self heal in the form of Roost.
For High-end battling, I suggest dropping in Pursuit and possibly Bullet Punch. That helps Scizor chase down fleeing Psychics and outspeed annoying Rock types.
Also, what is your Scizor's ability? If it has Technician, you could replace X-Scissor with Bug Bite (obtained at the Battle Frontier move trainers). Bug Bite gets the Technician boost, bringing its base power up to 90, much stronger than X-Scissor, and has the added effect of stealing and eating your opponent's Berry, very handy.
It doesn't learn it till later (if memory serves) but Scizor also learns Iron Head. Without Technician boosting up Bullet Punch, Iron Head is Scizor's best Steel move.
I'll let Serebii [http://serebii.net/potw-dp/212.shtml] give you some more options.
