If you have a drawer that's constantly getting stuck (or just isn't sliding open very smoothly), a bit of this special nylon tape can fix the problem for you.
This is one of the easiest DIY fixes you can do: just grab some drawer sliding tape and apply it to the "meeting" parts of the drawer:
For a more permanent fix, apply nylon drawer slide tape to the parts that come in contact with each other . . . The tape won't stick to wax or dirt, so prep the surface first by lightly sanding it with 100-grit sandpaper and then vacuuming to remove the dust. Then simply cut the tape to length with a scissors, peel off the back and stick it onto the wooden drawer runner.
It should only take you 5 minutes and a couple of bucks. Check out the post at Family Handyman for more below.
How to Fix Sticking Wooden Drawers [The Family Handyman]