for some advice I gave to a transfem friend of mine:
1. wash your face after shaving
2. lotion it up, wait on it to absorb
3. apply color-matched concealer and blend it in using a blending sponge or a brush if you're efficient.
4. ensure that it's got a good gradient around places like your mouth and nose, or it'll look like a bunch of hard edges
5. apply color-matched foundation all over it, I personally use powder foundation in lieu of liquid foundation (cue the infamous powder-versus-liquid debate that'll never end, like vi and emacs)
6. while you're here, you might as well do a little mascara and eyeliner (also liquid eyeliner is infinitely better than those moronic dry pens, which require sharpening and therefore lose a lot of the product)
7. if you wear hats like I do, darken your eyebrows with a brow moose or however it's spelt
8. put on some eyeshadow to recover color behind your glasses if you wear them, since they do change the way light shines on your face

hope this is useful advice!!