I like this introduction to decision making techniques at Creative Market.
"Some decisions appear to be relatively straight forward until you take a step back and look at the entire > picture with a fresh perspective. You may notice that there are a variety of factors that actually impact > a choice or decision that you did not notice before."
— Creative Market, Models for decision making
The post also features a nice mind map example from Learning Fundamentals focused on personal actions for reducing climate change impacts.
I find the iPad an ideal tool for mind mapping especially with the power of iThoughtsHD.