Tips for passing as an FtM

• Wear men's clothes. This is simple enough start purchasing men's clothing that are the appropriate size. If you want any further tips on this one please visit http://ftmguide.rassaku.net/
• Bind your chest. If you have a flat chest that isn't very noticeable then you could just use a sports bra, but for those who are more busty I'd suggest buying or making your own binder. http://www.underworks.com/men/compression-shirts-29
• Get a hair cut. It's pretty obvious most men wear a short hairstyle, and this is also one of the more difficult to find a haircut that will be good for your face structure.  http://www.fashionbeans.com/2013/the-right-haircut-for-your-face-shape/
• Practice a deep(er) voice. Most men develop a deeper voice and you can practice, and I'd suggest with a friend so that they can help tell you what you might be doing wrong. 
• Build Muscle. Women unfortunately don't have the same muscle mass as men, and it's suggested to gain muscle to appear more masculine. 
• Change Mannerisms. 
• Adjust the way you walk to appear more masculine.
• Many women sit with their legs crossed men tend to take a lot of room, or just rest one leg on the other.