ORIGINAL: Copper31
Not sure where your hunting but in the area I hunt I have all the yardages mark out. I have a 30 yard rope and I mark any tree that I can at certain ranges. I know this might not always be possible in places that lack terrain.
That's the method I used before I got a laser RF.
I also had 20yds marked on the rope as well.
I tied the rope to the front of my treestand so the distances were more accurateand also used it for pulling up my Bow. Where there were no trees to put flagging tape on I just stuck some into the ground with a stick(easily seen from the stand).