In my opinion these tools do restrict you too much. I prefer plain sheets of paper (A0 or bigger) pinned on the wall. Post-Its are wounderful for organising and structuring ideas. Probably parts of the books (there are many more) "Presentation Zen" and "Businessmodel, you" helped me with developing my own way of doing it.

Essentially, I do write every idea on a Post-It and put them unordered onto a white paper (e.g 2 m long 1 m high). Afterwards I start to order them. This is an iterative process and I do it at least three times. These Post-Its serve as heading for my thoughts. I do write them underneath with edding.

These posters  stay at my wall as long as I need them and slowly, over time I add or reorder something. Highly recommended. Furthermore it helps, to walk around, move your arms, go back and forth etc.