


Euler's number: e is 2.7 1828 1828 I wrote it with the spaces between the 1828's because many people remember the 2.7. And 1828 is one year after Beethoven died. This trick works best if you know your classical composers.
This memory trick using historical dates seems strange even to me; if anything the physical constants actually helped me remember the history dates, but either way I remembered. Memory tricks can be powerful tools. For example you can memorize nearly 4000 digits of π with a mnemonic technique, but the most powerful memory enhancing approach is certainly the method of loci.