While it is one of those things that needs to be done, no one likes to go zero their rifle. Repeated trips walking up and down the range and hopefully you are at least on paper for your first group… Well, Frank Proctor, from Way of the Gun, and Jerking the Trigger have come up with a great target. Through Science! they have figured out a target you can zero on at 10 yards which will give you a 50/200 yard zero for your rifle at range. (The target is specifically for your AR-15 / M-4. You should of course then verify at one of those distances.)
You can find the printable PDF file at Jerking the Trigger. You can also see Frank Proctor explain it here.