When I crossplay, I have some men's deodorant I wear. The scent isn't overpowering, but it's definitely male. I don't know if it helps with the passing or adds to the character for others, but for me it gives me a little reminder that I'm a guy right now.
Next Up: Ohayocon 2015
Hazel Tellington, Gaz Membrane, Kyo Sohma (tomboy)
2015 Plans: Ohayocon, MARcon, Origins (maybe), DragonCon