Here is a good example of what I would call an "Environmental mind-map". I found this one in the internet, but I think it is a great idea to draw a personal one yourself.
This is how it works:
1) You think of an environmental problem you know and write it down in the middle of a sheet of paper (e.g. climate change)
2) Then think of general actions which could improve the situation (e.g. save energy). Draw a branch for each general action you can think of.
3) Then think of specific actions you can do yourself (e.g. turn the stand-by mode of your TV off, ...). Draw a branch for each specific action deviating from each general action.
Then you can make a fancy sketch or poster out of it and hang it somewhere, where it will remind you of your good intensions ;o)
AND PLEASE: if you have the chance to scan it, please upload it to eurotope!!! Since we all have different life circumstances it should become a fancy array of mind-maps.
Awaiting your contributions.