Here are the things that I have found to be most helpful to my femme appearance:

General tips:

Eyeliner.
You can get either a pencil type or liquid type eyeliner. If you get the liquid type, get a little make-up brush also. Use the brush to "blend" in the edges of the eyeliner lines, so they don't appear too harsh.

Earrings!
Get the dangly types, either pearls or "gold look". My favorite accessories are dangly pearl earrings, a pearl choker, and pearl bracelet. These you can get at the "accessories" shops at the mall.

A-line or flared skirts create the illusion of a hip.
We don't have the same hour-glass shape as real women, so we need all the help we can get in achieving that shape. STAY AWAY FROM THE TIGHT CLINGY LYCRA STUFF! They're fun in the house, but nothing gives you away quicker when going out than a tight, short, spandex skirt! I have not seen many T girls who look good in that stuff. (There are exceptions, but very few, I think.)

Halter-style tops de-emphasizes the shoulders.
The inward diagonal lines of a halter top de-emphasizes the shoulders. Conversely, avoid boat neck & V neck. Converging lines usually emphasize the wide end of the V and de-emphasize the narrow end of the V.

This is also the reason for the popularity of the so-called "hankerchief top": its upper half, especially when in a bandeau style with the horizontal line above the breasts, emphasizes the breasts, while its lower half de-emphasize the waist. Of course, if the top is in a haltertop style, it would have the added bonus (for us T girls) of de-emphasizing the shoulders.

Make-up:

Kevin Aucoin's "Making Faces" is a great make-up resource. The man probably has forgotten about make-up than I ever hope to know, so you should go buy his book (or go to the bookstore & look it up when you need to!). Also check out his follow-up book, "Face Forward". Amazon.com carries both books.

I can only offer a couple of things based on my own experience.

What to do about your beard shadow:

• Shaving:
  • Use a brand-new blade.
  • Use lots of cream.
  • Shave once in the usual (downwards) direction, then once more in the upwards direction. Be gentle, go slow. When you're done, your beard area should literally feel as smooth as a baby's behind.
• Use a "cover up" stick. These are sold in the make-up section of places like Target, K-Mart, Walmart, etc. Pick a shade one notch lighter than your skin, and one shade one notch darker.
• Apply the darker shade liberally; then "dab" the lighter one on and blend with the tip of a finger. Don't go beyond the beard area yet. Add one shade or the other until you get a decent match to your skin. When you're happy with the match, start to blend the stuff in around the edges. Working around the perimeter of the covered area only, blend the edges into your skin.
• Finally, dab on powder with the powder's applicator. (Pick a powder a tiny bit darker than your skin.)

Setting your make-up.
"Set" the powder by dampening a folded up piece of tissue. You want the tissue to be damp almost to the point of dripping, but you don't want it so wet that if you press it, droplets of water will run out. Firmly press the tissue against the powdered areas. This will "pack" the powder down and give it a silky-smooth finish.

Breastforms

I bought a pair of silicone full breastforms (as opposed to the "add a size" ones), size 36B, from Fredrick's of Hollywood, and they're worth every penny!


Tucking!

"Tucking" is what a T girl would do to keep her unmentionables out of the way, achieving a smooth feminine contour "down there". Normally, I tuck by pulling my dangly bits back between my buns and then putting on a couple of extra small, extra tight panties to hold everything in place. Swim briefs work very well too, but they tend to be made of heavier & bulkier material so they are more obtrusive. Here is a pictorial guide to this tucking technique.

Recently, I learned a new way to "tuck" from my long-time T-girlfriend, Cindy, a.k.a. Anisa Kimura. Anisa told me how she uses surgical tape to tuck. (I use NextCare Clear Flexible Tape, in 1" width.) The idea is that the tape would do the holding instead of a panty. Here's what it looks like.

Here are some pics of results of my tucking technique.