I usually get the bar end plugs in as soon as I start.
I put my finger in the bar end and do one revolution of tape around my finger first then a couple on the bar then put the plug in.

At the other end keep winding until you're too close to the stem then fix the end of the bar tape down with insulation tape.
Run a sharp blade around the circumference of the bar where you want your bar tape to finish. Remove the excess and seal with a couple of winds of insulation tape.