There are a few things that can help passing better:
-growing hair out so it covers brows and forehead.
For a quick fix there are clipin extensions available, you might look it up on youtube.
-mannerism and gait also play a part.
You might try to feel girly inside ... just feeling it. It should radiate outwards, showing a natural mannerism and gait.
Not overdoing things ... just feeling it and doing what comes naturally.
-walk
women kind of almost walk on a line, pushing hips forward.
Men just put one foot forwards, and also move shoulders forwards.
-voice
you might try to raise your voice a bit.
With some experience its like finding a newer and higher register.
reading books aloud might help.
It might not be necessary to do this for a longer time but consistently, over a few days, a few minutes every day.
-here are more hints concerning voice:
http://www.nyspeechandvoicelab.net/transgender/voice-feminization/also women use more indirect language ... and having a bit a breathy voice might also help.
Some makeup might help ... or even simply having something nourishing on the face.
Some people use coconut oil or jojoba oil.
Otherwise simply some foundation might help:
http://www.soorganic.com/lavera-natural-liquid-foundation.htmlMaybe together with some volumizing mascara ... and a lipstick in unobtrusive colours ...
*hugs*