Use the Right Slides
There are a dozen kinds of drawer slides out there, but if you want to keep shopping and installation simple, stick to these two types:
Roller slides glide on plastic wheels. They're inexpensive, a cinch to install (it takes about two minutes) and nearly impossible to screw up. You'll find them at home centers under various names including side mount, under mount and bottom mount. Most are rated to carry 35 to 100 lbs. For heavy-duty rollouts holding items such as canned goods, use slides rated for at least 100 lbs. The big disadvantage: Most roller slides extend only three-quarters of their length—the back of the drawer stays in the cabinet.
Ball-bearing slides glide on tiny bearings. The big advantage of these slides is that they extend fully, giving you complete access to everything in the drawer. They're about three times the cost of roller slides, and they're usually rated to carry 75 to 100 lbs., but you can get 200-lb. versions for about $40 a pair. Home centers carry ball-bearing slides, but you'll find a wider variety at woodworkershardware.com. The big disadvantage: They're fussy to install. If your drawer is a hair too big or small, these slides won't glide.
Tip: Make drawer boxes about 1/32 in. smaller than you need. It's easy to shim behind a slide with layers of masking tape to make up for a too-small drawer. It's a lot harder to deal with a drawer that's too wide.