[chris_mahan]

Pen and paper. If I need to have an electronic version, I take a picture with my 8 megapixels phone camera and I email it.

It's the fastest tool, but it does require knowing how to draw straight lines.

It also leaves management under no illusion that the thing is "almost done".

I work at a company in the top 15 of the Fortune 500.

[aespinoza]

I agree to a certain extent. I still use my notebook to create mock ups, but nothing beats balsamiq's demo-ability. The fact that you can take a mock up and make it interactive, and show the real flow is amazing. I have taken our mock ups done in balsamiq to design meetings, and it makes it extremely easy.

[chris_mahan]

The thing I like about pen and paper is that I can go hang at the local coffee house or library or park, and not have to worry about wifi. Also, a guy scribbling in a book isn't as stared-unwelcomingly as a guy with a laptop.

[aespinoza]

Definitely, if Wifi is a problem, then a notebook or whiteboard is fine. Most of the time, when I have demoed wifi isn't a problem :D

[tallofrenzy]

Unfortunately,with pen and paper, it gets clumsy when you have to erase (even if you use a pencil/eraser)..

[chris_mahan]

That can be a problem. I usually just make all the changes I need (gets scribbly fast) then turn the page and copy the good stuff to a new page. This works because I can draw fast.