My UFO tips:
1. Take stock - pull them all out, do an inventory
2. Think about why it's in the UFO pile -
where you stuck? did you just lose interest?
Did you decide you didn't like the technique?
Was it too hard at the time? Maybe your skills have improved.
Did something else catch your attention?
Were you on a deadline, and had to finish something else?
3. Decide which you really still want to finish, put in one pile
4. Decide what to do with the remaining projects
donate to a project collecting for a charity (many times, have a long arm quilter who'll finish)
donate as-is to Goodwill or other thrift store - someone else may love it
5. Make a plan for finishing what you want - some things that have worked for me:
Sampler quilt with blocks you've started
Make the project, and donate to a charity
Finish them as gifts for others
Promise yourself to try a new technique as you finish the project
Swap UFOs with a friend
Take the UFO to your next crafty get-together.
6. Don't stress over your UFOs - enjoy the journey, the process. If they bother you, deal with them. If they don't, just let them collect.