Yesterday when buying strangely flavoured chips from the Asian grocery store I had a bunch of change but was about 15 cents short. The cashier decided she would rather accept my shrapnel than make change for a $50 note. I felt bad though.
We need to have the same system as in Canada where they have a coin plate next to the register. If you get some small coins you don't want to carry around you drop them in the plate. If you are 15 cents short you just take some coins out. Everyone's happy.
When I start my own country it is going to have coin plates.