Minecraft wiki entry for Manhunt, associated text: Don't leave spare tools and armor on the floor, the runner may get them using a Fishing Rod. or picking them up.
Don't attack the runner alone as you may bring extra resourses for the runner.
Don't attack the runner who is intending you to follow him/her because it may be a trap.
Burn the remaining items gotten by bartering since the runner may find the pit and search through the items (you can make a trap using it)
Be aware of random lit nether portals because they might be traps.
ALWAYS bring a bucket of water with you. It might come in handy.
Split up your food in case the runner kills the hunter with all food and giving away all of them.
At the start, one-two hunters should chase down the hunter while the others get resources (2+hunters)
ALWAYS check your compass for the hunters' location
Get a bow ASAP as you can shoot the runner down from the sky base (if your shooting skills are good)[1]