I just wanted to write down some tips I have gathered along the way. I felt compelled to write this because we have a new MtF in our church and...well...she's not doing so well in regards of presentation and it's causing some concern for my congregation (not because she is trans..because of what she is wearing).
1. Wear clothing that fits you. Do not wear clothing that you would like to wear if you were on project runway. Wear clothing that really fits you. Tight fighting blouses and skirts will not give you any favors and if you are not a size 6, it will more than likely give you away. Our physical body shape isn't like that of Scarlett Johansen. Wearing clothes that fit can give a better illusion that you do have that body type.
This relates to number 1. If you're going to wear mini skirts, be sensible with it. I wear mini skirts a lot. I love them. However, I get miniskirts that will flatter my legs and hips without me looking like I just stepped out of the movie, "Pretty Woman." The shortest I will go is about 2.5 inches above the knee. I also do a more preppy look. Environment is also key. Know where you are at and dress for that venue.
2. Body Language. When it comes to being feminine and using body language, I believe there is a delicate balance. If you walk around like a lumberjack you're going to be clocked. If you try too hard being feminine, you're going to be clocked. I was with a transgirl when I was first transitioning and she was trying to be so feminine it was just disturbing. She looked at every feminine body language and gesture and incorporated into everything she did.
Look around. Look how girls act. Look how they walk, talk, and sit. As you can see, no one hardly acts like a Valley Girl (unless they are pre teen).
Also, when you sit, don't spread your legs....even if you wearing pants. Generally not a good idea.
3. If you need to wear a wig, invest in some money for it. No, I don't mean you have to spend 5000 dollars on a wig to look presentable. I mean, do your research. Trying on some wigs. Get professional advice as to what wig fits your face. What colors will best accentuate you. I have discovered some trans like to wear a wig like their clothing....that style looked good on a girl so it has to look good on me. Doesn't quite work that way. I remember in the 90s when a lot of girls were getting the Jennifer Aniston hair look. Some looked really good in it while others just looked plain ridiculous. Hair styles do not work the same on everyone.
When you do get a wig, do not get a cheap crappy one. When I see a trans person wear a wig that is so overtly "fake" I get nervous. I get nervous because I think "Wow....does she not care how she looksm in public?" Then all these crazy thoughts like "is she mentally unstable" and stuff goes flying across my mind...and if I think that and I am trans..I wonder how other people will think when they see your wig. And yes, if you get a cheap wig people will know it's a wig.
If you plan on getting a wig and you can only afford synthetic then I would suggest a monofilament wig with all of it hand tyed to the cap (this means your hair can be styled and moved anywhere since it is all hand tyed), and lace front (this gives the illusion your front bangs are growing out of your scalp). Plan to spend at least 250 to 450 dollars on it. Is it a lot of money? Yes. But at least people wont be staring at your wig all the time

3. Don't stare at people. If you think someone is clocking you, the last thing you need to do is stare back at them thinking "OMG, Ive been HAD!" When you don't stare back or give the expression you were clocked it presents yourself better. A real girl wouldn't stare back and think "I've been clocked!!" Try to do the same.
4. Your voice. For the love of all things sacred and holy, work on the voice. I had a VERY deep voice for 34 years before I transitioned so the whole "I can't do it" is only in your head. The most passable trans who doesn't have her voice trained can open her mouth and say one word and get clocked. On the other hand, someone who may be having a harder time "blending in", if they got their voice down and started to talk, people will think "ah ok. She's a girl."
5. Makeup. Your face is not a canvas for Bob Ross to paint on. You do not need four coats of concealer to hide that beard shadow. If you do, then you need better makeup. Pancake batter face is not attractive

Find the right product out there.
Also practice, practice, practice your make up. Look at youtube, go to a department store and do your research.
I have to go to work now...otherwise I would continue this discussion but that's what I have for now.