I have a LOT of the achievements, but here are a few suggestions.

Spread the Love - give a bike to a friend.
If You Got The Money, Honey - sell a bike to a friend
Family Discount - sell a bike to a friend for less than it's worth
You're Out Of The Family - dump a bike on someone for MORE than it's worth
Cheapskate - Get a GREAT deal on CL
Roads? Where we're going, we don't need "roads"! - Commute solely by MUPs and trails for one month
Lucky Luna - Forgot your headlight? It's cool. there's a full moon tonight...
Fly Me To The Moon - Forgot about that pothole (night).
Lunar Landing - Landed safely after encountering that pothole at night
Packing Heat - Carry a pistol in your bag/panniers
Dirty Harry - Fit a holster on your bike
Be Vewy, Vewy Quiet... - Hunt while on a bicycle tour
Born In The Saddle - commute over 300 days in a 12 month period