LOL! Being careful!!! It's not easy, I won't kid you, but do it over a smooth plate so that any you may spill can easily be scooped up and put into a capsule. Doing it over applesauce or juice or whatever could result in you getting a lot more than you intend.
If you don't have a second capsule to put it into, then you can keep it in something that heat and humidity can't get to it. It will degrade the medicine.