Hey guys,
since I am not that tall and because being tall is a big advantage with many things, including pickup and sarging etc, I had to come up with something.
Over time I was able to make a short list of things you can do to make you look a bit taller than you really are.
*Keep your hair short on the sides of your head, and keep it a little longer on the top.
*Wear tight fit clothing, possibly with vertical stripes.
*Do some workout, but don't overdo it, cause that might make you look like some sort of Arnold Schwarzenegger midget.

*Wear shoes with heels, e.g. like
http://www.schonagen.nl/images/schoen6.jpg
*Put some soles in those shoes. I have 5 soles in each shoe, gives you nearly another whole cm.
*And of course: stand tall, don't slouch! (Thanks snakeeater1337)
I might think of some other tips later.