Ever tried a notebook Andy?
Seriously though, I've done a lot of work with accelerated learning and memory techniques such as those mentioned above.
I don't have cause to use that many of them in my current role and the term "use it or lose it" couldn't be more true. I used to use these techniques all the time, but now I don't need to I've forgotten many of them, or have a hazy recollection at best (how ironic is it to forget memory techniques).
One thing that has stuck is the use of mind maps. Using these to put a more visual representation of concepts, ideas and experiences down on paper is far more powerful than linear note taking because it helps to capture things that are related to each other and have lateral connections.
As an example, the area of the company I now work in is concerned with business process analysis. Previously the analysis was done on very straightforward processes, like data entry tasks etc that were transactional, and the whole organisation was using excel spreadsheet templates (of all things) to capture each step by step process.
I came into this part of the organisation to manage the first project they had ever done which was concerned with capturing processes that were not purely transactional. The people operating these processes could only work effectively by having developed a complex network of peers, a good deal of collective and individual experience, by making good judgement calls and decisions based upon complex criteria. How do you capture peoples experiences on a spreadsheet? The team were floundering, but as the 'experts' in process engineering they also resented the new boy coming in and telling them they were using the wrong tools. I had a lot of resistance to mind mapping techniques, but it works and its usage is now spreading like wildfire through this part of the organisation.
How does it help your memory - purely by being more visual and helping to relate lateral thoughts.
The best software I've come across is mindmanager from
http://www.mindjet.com Failing that, Glyn's method also works for me at home