New to me, ever since I received my first Alembic I find a need to tune her up every day. All strings will be either sharp or flat by the same amount. Depending on the Temps and Humidity. New to me is that my Fender P tends to stay set. Don't mind, I just have to keep a closer eye on it.
 
  Recieved the Planet Wave tuner today. Some getting used to for the reading isn't instantaneous. It A/B's with my other tuner well. Not to mention fitting in the case and being almost hidden from view I might just set and forget it and leave it on. ?? I Love when things come together.

I check tuning before every set and after particularly ambitious songs.  I tend to flog the instrument and sometimes it pulls it out a little bit.  I've done this with every instrument I've owned, including a Steinberger L2A.  If it's got strings, I can pull it out of tune.
 
John

I just bought a Snark...great tuner for bass & guitar. Love it. Beats the pants off of my 100.00 Boss.

John; I've seen your videos.  I would tend to describe your handling of the strings as perhaps more loving than flogging, but your word choice does make the point better.  And I too tend to pull my strings out of tune, with a technique that might be described as flogging lovingly aggressive.

Er, yes, lovingly aggressive seems to, er, cover all the basses quite well..