Brake adjustments

Release the brakes on the part of the truck you're working on, use at least one sturdy chock kicked into place, hard. More won't hurt, literally-speaking. Chock both directions if possible so if your truck is hit it won't roll.

With your trusty long-handled socket bar (I like a swivel head for this operation) and the correct socket, tighten the brakes until the drum will not ring clear when it is struck by the socket handle.

Then loosen just enough, in tiny increments, so it does ring clear. A separate metal bar for lightly striking the drum can save time taking the ratchet handle off as you back off the adjuster.

Shoes look really close and the drum rings? Done. Next one. You can do a whole truck in a short time if you stick to it.

BTW, after being parked overnight in icy conditions, drive an S-turn when pulling out to make sure that all wheels are turning. If not, use the above method (including chocks) to back off the brake adjustment until they PING loose, then adjust as above. Nothing as warm and relaxing as laying there on an icy parking lot releasing brakes while other trucks are moving around you.

A sheet of sturdy dry cardboard stored in the undercab storage can be helpful. Fold it up and tuck it away and it'll reduce the threshold for doing this important check, because you won't get as dirty or cold.

Obviously brake shoe thickness is also important. Those "helpful" dust/rain shields are often in the way for this important assessment.