In my experience, it is best to set up a practice plan with a theme, or a common thresd to it. Like a passing practice, or defending practice...etc. Keep the instruction to a minimum and show them what you expect them to do. You want to set your players up to succeed, and once they master a technique, then get progressivelymore difficult as they succeed at each level. What they succeed at in practice, they will succeed at in the game. In all my years of coaching, I have found many reliable websites that are full of drills and practice tips. I will place some of the links here for you to go and check out.