How to Turn Yourself into a Giant
Behind the scenes video:
First, you find a plate shot...
...then, process the image to taste.
One you have the plate shot prepared, go up to your roof in NYC and take a picture of yourself doing a weird pose because you didn't get the shot in SF.
Composite the two shots together.
Make yourself blend in with the locals by hiding your right hand behind a tree and adding some shadows.
Add a color grade, some cheesy typography, and voila! You've made yourself into a giant on a mediocre postcard!