On every trip I end up with piles of small coins. The reason, I find it quite difficult to identify foreign coins quickly. It is quite annoying to to read every value of a coin, especially in those countries where you need a magnifying glass to read the values (e.g. try making sense of US coins for example). The result is that I usually pay with bills leading to yet more coins due to change.
Is there a trick or template that would enable me to quickly make sense of the different coins in a country I am visiting?