Whiteboard Coding Tips for Interviews

6. Write with your shoulder. Trying to draw whiteboard-sized letters with your fingers produces sloppy handwriting. Keep your hand and wrist stable, and move your shoulder. This applies to normal handwriting as well, but the improvement isn't as immediately obvious: http://www.paperpenalia.com/handwriting.html

A definite +1 for writing down the question.

Regardless of your confidence in yourself, it just takes one inarticulate interviewer sending you off in the wrong direction and then marking you down as "couldn't solve the problem and then claimed to have misheard me" to ruin your review, especially since many companies nowadays require a unanimous "yes" before making an offer.

How about number 1: Give the interviewed person a working pen.

No, I'm not making this up, sadly :(