My method is probably not helpful to anyone but me, and I'm not sure it's all that helpful to me, either. It goes like this:
Steps:
1) Keep banging head against wall until I can do no more.
2) Collapse into dark funk of despair over the foolhardy notion that I could ever be any sort of a writer.
3) Spend an extended time torturing friends and family with brainstorming-cum-therapy sessions.
4) Start over from scratch.
Notes:
a) "Scratch" may mean entirely new from word one, or it may mean starting from whatever point seemed to have been working before I got stuck or lost. It depends on just how fubar the project is.
b) Step 4 usually involves the sacrifice of at least one darling, often more than one.
Example: My current WIP is a learning experience in that it has gone off the rails about as often and as disastrously as an 1840s railroad train. To get it back on track I have had to so far:
1) Scrap three nearly complete draft manuscripts as useless.
2) Fire characters, replace them with others, fire some of those and rehire the old ones.
3) Completely rethink and replace my FMC.
4) Reinvent and refine my MMC several times, including doing some role-play team creative writing using him to develop a consistent voice.
5) Revamp the concept on which I was constructing my plot.
6) Develop new organizational techniques for keeping myself on track, too.
So... What's the nature of your problem right now?