delaying your downwind

here's a scenario to consider, let's say you're on the downwind following someone and they are going either way slower or else do something like turn late to base. if you need to delay you have at least a couple of choices:

• extend the downwind (at KJYO you can't doing this for runway 35 because you might enter class bravo airspace at dulles)
• do a 360 turn, you probably shouldn't do this because you're not supposed to make turns to the right
• go ahead and turn midfield (assuming that there's no conflicting traffic) and enter the upwind as if you're going around (while watching out for departing traffic)

i'm sure that there are other actions too, it's things like this that i'd like to hear /read more about at times. i don't think that i've seen too much literature on "how to react to unusual situations" but i'm keeping an eye out for it.