Edit for 2014: this article is now nearly 4 years old, and nowadays there are soft-close kits by Blumotion and others that make this process much simpler and cheaper!
In this instructable I will teach you how to retrofit the Blumotion soft-close drawer system (from their TandemBox line) to almost any drawer! Most people prefer to retain a consistent appearance in their kitchen, so replacing the drawers entirely is out of the question (not to mention very expensive.) The Blumotion system is one of the best, however it only works with the corresponding drawer system from the same company... or so they thought :)
Tools you will need:
- bolt cutter
- small flat-head screwdriver
- small hacksaw (I used a coping saw)
- some bolts (small thread, M2.5 or 0.1" thread diameter)
- some screws
- ruler & pencil
The only requirements for the existing drawer:
- approx 12mm (0.5") clearance on either the left or the right of the drawer (almost any rail system will have this)
- approx 9mm (0.35") clearance behind the drawer
The drawer can be made of wood or metal - doesn't matter.
Note about the small piston-type door buffers / dampers:
Before this project I attempted to use these to damp my drawers, but they didn't work well (drawers wouldn't self-close, or still slammed shut.) The Blumotion system with its long throw and spring+latch mechanism overcomes these issues. Thanks to adamazing for bringing this up in the comments.