If it's going into the crock pot in the morning, I put it out the night before and let it thaw. I usually put it in the sink so any excess moisture can drain.
If it's going to be cooked that evening, I put it out in the morning.
I never use a warm water bath. Heat grows bacteria. This is not good food-handling technique. A cold water bath will thaw the meat more safely if you're really in a pickle.
I've defrosted in the microwave before, but I don't like how it defrosts and I've found that a cold water bath seems to defrost pretty quickly.
If all else fails, I'll just go get a fresh item from the grocery and remember to put tomorrow's dinner out to thaw in time. :-) Or choose something else that I don't have to thaw.