Get yourself a good battery charger from Thomas Distributing and stop worrying about it. You can leave the batteries in the better smart chargers all the time and not worry about them. They also support conditioning.
http://www.thomasdistributing.com/AA...ers_c_644.html
The better ones aren't cheap, but IMO, they are worth it. I have 2 of the Maha 8 battery smart chargers for my AA and AAA's.
-David