For your foundation you can either use a slightly damp sponge. I heard where some people use a slightly damp kabuki brush, but I'm not sure that would got on nice a smooth.
For e/s I use a damp sponge e/s applicator.
Whatever minerals you want to use damp, just make sure you sprinkle a small amount of them on a saucer or little plate. Any minerals that get damp and you don't use, toss. You don't want contaminated minerals which could breed bacteria.