I used to have a portable kit that worked very well. If you go to an office supply store, you can get one of those small leather cases that comes with a miniature stapler, pen, pencil, tiny ruler, staples, ink, etc. They're about 5" by 4" and they have elastic bands inside to hold all you paraphenalia in place.

I got one of those, and replaced all the office supplies with my small pipe, papers, stash, visine, etc, etc.