Do the easy ones first

Anyone remember the SAT's?  I don't remember doing terribly well -- but I remember one bit of advice: "do the easy ones first."  The idea being, if you can't start getting easy question after easy question under your belt -- before you know it -- you'll be a quarter done with the test.  I'm doing this more and more with writing.  I don't know how the whole thing is going to work out, but I do know there's going to be this once scene where _______.  Write it real quick.  I don't know what comes after it, but I do know there's going to be a scene where they ______.  

Just jot it down real quick -- and then you'll have something.