http://blog.makezine.com/archive/2010/06/circuit_skills_perfboard_prototypin.html

When you think “DIY electronics,” one of the first images that likely comes to mind is a bunch of parts and wire soldered to a standard piece of perforated circuit board — and that makes sense. Perfboard is super-versatile; essentially it’s just a grid of potential solder-point connections. You can trim it down to just the size you need, or leave extra space for future enhancements … or revisions, if need be.