Are you sick of collecting your receipts and putting them in a shoebox? If so, here are some great digital solutions:
https://toshl.com/
dwolla
CurrencyFair
Revolut
veem
TransferWise
There are also payment solutions here for paying employees.
I think the best way to do it in future will be through cryptocurrencies where cost of transaction will be zero but we’re not quite there yet so the above solutions are currently the better solutions.