What's the easiest way to send small 1000 satoshi payment?
In this case the easiest way is paying a fee that should not be less than 50000 satoshi.
The transaction looks like this: send: 0.00051000
BTC where the fee is 0.00050000
BTC.
(You did not ask which is the cheapest way)
One of the reasons why
SpectreCoin exists.