For some time now, you have wanted to return to playing the musical instrument you learned to play when you were younger. You have finally gotten around to practicing again, and want to make the best use of your time. What do you do?
Hold yourself to a strict practice time every day.
Choose pieces that stretch your abilities a bit.
Practice only when you are really in the mood.
Pick pieces that are far beyond your current ability, but that you can master with diligent effort.