Some simple things, first off I agree feed them the same time every day, routine is key for cattle, the better you stick to a routine the more relaxed they will be, if you deviate from your routine some calves will stress. Do not change feed if you can help it, get them on a good ration and keep them on it, you can make subtle changes but make them over a few days. Watch them, if they go off feed, get loose, show signs of bloat, address these issue immediately, first is something new or different, is it a new batch of feed, new hay, is the weather different, are they running a fever, (have a livestock thermometer on hand and use it), figuring out what is going on and what the cause is allows you to make the needed changes or adjustments with out setting them calf back. If you take the wait and see approach they might be fine or they may go down hill and you may end up setting them back a few days or weeks.
We fed Stabilized Rice Bran, for the steers on track we fed it the last 90, for calves that were behind we fed it to them the whole time, loaded with energy and puts a great layer of smooth finish on them.
For the person feeding alfalfa, for fat steers on grain it is not a good choice, way to much protein, your feed should be enough, grass type hay is best. We fed grain twice a day and hay at night, we had a large kick out pen they ran in at night and that is where they got their hay. If you have a large pen to turn them out in, you should, they will get more exercise and can get out and move, this is key once you start tying them during the day, they really need to get out and use their muscles.
Be consistent, patient, diligent, and you should be fine.