you will get many different opinions. differentstrokes gave some very good advice.
when i do it,i start it,ride it lightly for a few minutes check for leaks. listen for noises re torque. then i ride it like i normally do taking it easy for about 15 to 20 minutes on the second start up. then i ride it like i stole it.
top ends on my personal bikes have lasted years.properly jetted.