Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto. I took ...

If you play guitar or another string instrument, one of the thankless tasks you do before you play—and in between songs—is getting your instrument in tune. There are several ways you can do this: You ...