Flowcharts and Planning

[monele]

If it's a simple tree structure, I'll often use boxes describing the choice (if any) + scene and linking everything with arrows.
If there is a need for it, I'll use ovals for conditions/choices. At times, I'll also add some bg color to boxes. The reason can be varied such as marking bad endings or paths that make you win points.

[mikey]

I actually ose boxes only - the choices I write over the arrows pointing to the other box.