Someone on here, showed a picture years ago about how she set up for free motion meandering - she drew a wandering line that went from side to side, varying the top to bottom part too - this was the general line to meander around (not exactly on) so that you never got stuck in a corner with nowhere to go... it gave you an idea what direction to take your quilting. I've tried it and it worked for me.
(If you were the genius behind this idea, thank you and my apologies for not being able to remember who said/showed it)