Doing it standing up...
Pitfall...
heh heh
But seriously... I'm surprised at this question. It's mostly common sense and (believe it or not) experience.
Somethings to consider.
There are
many different "standing up" positions. Just like "lying down" positions.
Up against a wall.
Up against a wall, from behind (ie her face to the wall).
Her legs wrapped around you.
Standing up, and her bent over...
This list goes on and on.
If you're face to face, against a wall for example, your different heights may have to be considered. You might have to bow your knees slightly.
If she's wrapped her legs around you and "lowers" herself on to you, you can get very deep penetration. Some girls love this. Some girls find it painful.
All in all, the more positions you try the better.
just don't do what most young guys do when they get too excited and try too many positions one after the other in one session...
Mr Mephisto