When I fly by the seat of my pants the result of my story is usually a tangled mess that never gets finished because I didn't think far enough in the future regarding the plot. Or the beginning doesn't match the middle whatsoever (that's what revising is for, but still)
This time, I'm going to try outlining first.
If you have had the same problem or you don't care for writing without a plan, try outlining.
Below is a simple way to outline your story.
Happy Writing!
Source: http://pbackwriter.blogspot.com/2007/09/novel-outlining-101.html