Using a permanent marker, draw an oval slightly larger than the hole.
If you have a wide hole, you can use a rectangle, but be sure to round the edges. Rounding the edges prevents the corners from getting caught and peeling up.
I followed this tutorial and used Tenacious tape by Gear Aid because it claims to not leave a residue behind if removed. That was a bad idea. I am now ready to upgrade this patch to a sewn one and removing the tape is absolutely leaving behind a residue. Really annoyed right now.