I have a series blurb done.  So my next step is to look at the blurb and figure out the logical steps that will have to occur in each novel to have it fall into place.  So in order to do that I will do a mind map to get some ideas together after asking some questions.  Like; if this happens what effects would happen here?  Who would it affect?  What causes this to happen?  What could be lost?  What could be gained? Who gets hurt the most?  And so on.  As many questions as I can think of to apply to the idea and pull out story arcs for each novel.  The whole A+B=C routine with a few left hooks and upper-cuts to keep everyone guessing.  This is going to be fun, but it will also take a while to complete.