Earlier this week, we described several ways to create screenshots with your Mac. Using the keyboard shortcuts in the Finder is great, but you may have noticed that the results aren't very sharp. Ivan at creativebits noticed that, too, and figured out how you can correct the problem.
He explains that a basic screenshot creates a JPEG with a resolution of 60 by default. As is often the case, the solution is just a couple of Terminal commands away. Set the default format to png, pdf or tiff for much better results.
If you're not the Terminal type, check out Skitch, which takes simple, great-looking screen captures.