With my main carry, my sp101, I usually carry 1 reloader in either a speed loader or strip, depending on dress. I don't like the inconsistency so much, but I can deal with training in both methods. Usually the same when training.
When I carry my Glock, I usually carry 1 spare mag, often in my pocket for convenience; training is usually done properly with a belt pouch. I don't fin myself carrying this much for routine concealed carry, which is why I haven't gotten a good mag holder that is comfortable