Two years ago at Canoecopia I learned that how you tie your knot with braided line makes a big difference.  I had trouble with my braided line breaking way too often.  What I learned is that I was generating too much heat when I tied my knot.  The line must be wet and when you tighten up your knot do it very slowing.  If your knot tightens too soon when you are pulling the knot tight it will generate too much heat.  I changed how I tighten my knots and the problem was solved.

For trolling I use a 20 pound test line.