You could go to the apple store, or you could go your computer,plug it in to your computer and go on the iTunes thing I think and reset it. It takes a long time to do, and you lose everything on your iPhone or iPod touch, but that's pretty much the only way to go on your iPod touch again. Unless you randomly remembered your password. Hope this helps (:
Connect your iPod Touch to iTunes. Press or Hold the power and home keys 10 seconds. Make sure you do not release the Home key until your iTunes says "We have detected an itouch in recovery mode." You can restore using your iTunes.