We asked, and you told us that what most needs fixing in your house is your front-door lockset. So here's a handy guide to help you know what you can repair yourself and when you need to call a locksmith
If key doesn't turn smoothly, degrease with electrical contact cleaner, then spray with graphite or Teflon. Insert key and turn several times. Lubricate at start of summer and winter. If it seizes up, call locksmith.