Changing things

Several questions come up a lot about plotting - how can you be sure it makes sense, how can you be sure it's not clichéd, how do you develop it, how do you get it to work out. Most of the answers have to do with looking at things from a different angle from the one the writer is stuck in (which is why plot-noodling is so useful - other people are pretty much automatically looking at things from a different angle than whatever angle you're using).

But mainly the answer to all those...