IMO the best tip is to have a broody totally isolated. Either in it's own set up or the nest is blocked from all other hens. The con with the latter is having to remove the hen once daily for toilet breaks. Not really feasible if she is a nest warrior or flips out a storm because those hens are likely to break eggs while you are letting them out for a break. And you have to be around for a while until she goes back to the nest and block it off again. 21 days of that.
If you have all hens in one set up and would like to move a broody to a separate set up, it's easier if the nests are mobile- lift the whole nest and move it at night. Some people have luck lifting a hen and eggs to a kennel but the average hen probably will have problems with that.
One trick is to move a hen you know will go broody is to move her to a separate set up after she has been laying good for a while, keep her confined to this and let her eggs collect in nest box- if she keeps laying, mark 8 eggs so the eggs don't pile up too much and you know which eggs are fresh. She should eventually go broody and you can replace the eggs, preferably waiting a full day and night before messing with her(if you wanted to replace the eggs for example) No rooster needed unless you want chicks from her.
The ideal would be to move all non-broody chickens, leaving the broody(ies) in their original set up but this is not feasible for most people.
