Freestyle tips and tricks by Light to get you up, speedy and Freestyling.
This is pretty old but still very useful. Tip #2 still stay true but not in Parameter mode in recent builds (Kr Epsilon Derivative = 0), the method is usable in Python Scripting mode. Tip #15 also only usable in Python Scripting mode with recent builds. And Tip #16: Crease Angle is for those sharp angles, like 90 degree corners. Anyway, please have fun with these tips. If you found new tips, please share in the comment.
Link: FreeStyle Tips