The Flying Trapeze Log Book by Alastair Pilgrim is an extremely useful way of recording your achievements. It has been designed with the amateur enthusiast in mind but professional trapeze artists will also find this 180 page log book helpful.
There is a section for where and when you trained, what tricks you accomplished, with or without lines, timings, techniques and any coaching tips you received.
This can be helpful to remember the advice you received, aiding your training and enhancing your progress. It can also be useful to demonstrate to new coaches exactly what level you are at as well as providing a nostalgic trip down memory lane!