I enjoyed the recent perusal of Vince Lombardi quotes, so I thought I would look into Yogi Berra. I laughed uncontrollably!
I’d give my right arm to be ambidextrous.
Half the lies they tell me aren’t true.
In theory there is no difference between theory and practice. In practice there is.
It’s like déjà vu all over again.
It’s tough to make predictions, especially about the future.
Never answer an anonymous letter.
Ninety percent of this game is mental, and the other half is physical.
Steve McQueen looks good in this movie. He must have made it before he died.
The other team could make trouble for us if they win.
We’re lost but we’re making good time.
When you get to a fork in the road, take it.
You can observe a lot by watching.
Always go to other peoples’ funerals otherwise they won’t go to yours.
MattTroupe.net 
Yogi also said “I didn't really say everything I said.” 😉
There are a bunch of Yogi quotes at Quote Collection:
http://www.quotecollection.com/author/yogi-berra/