Ideas comes to us suddenly in different places. The best understanding of an idea happens in relaxible places such as shower of dining. The point is you must write it anyway on any matherial.

During my long long pactice I recognize then ideas with it`s full brightness comes in a minute and then it starts to evanescence as a memory of a dream. You could catch a shadows but not a full idea itself. So I use every matherial suitable for writing from a peace of packing paper to my own hands. So long live to table-napkins! I am interesting how many ideas was noted on it?