From the perspective of a tallish person, don't worry about your height. It's no more fun up here than it is down there ;p
If you really, really feel uncomfortable though, there's nothing wrong with wearing heels, raised boots/shoes, etc. Hats are also a great way to gain height, though you should avoid anything with a wide rim (nothing beyond fedora-rim width). Long, narrow skirts and vertical stripes will also help the illusion, as well as puffed sleeves.
You should still try your best to feel comfortable without all this stuff. Just wear it to please the crowds, if you must c:
Tie a cinder block to your feet, both of them, and then dangle yourself off of a ledge or something. Eventually your feet will stretch down to the ground. Make sure the ledge isn't too high up or you will probably fall or become way too tall.
Once you're tall, there is no way to become short again. Make sure that you're sure of this choice.
Some people who spend a decent amount of time outside of the constant pressures of Earth's gravitational pull grow several inches since that force isn't restraining them at the time.
Sometimes returning to the surface causes this height to be lost, but still worth a shot eh?
