I made myself a few little calling cards to put up on my bulletin board, to remind me to make these calls as often as possible. They're available for your use, to print out and fill in your own senators or congresspeople, and to address the causes that mean the most to you. Here's an example of one of mine in use:
Each card fits on a quarter of 8.5/11inch paper (as below), so you can print out four at a time for your use. I'm hoping to add more cards as I go, but please feel free in the meantime to use the blank cards to address the other important causes. For references for numbers and scripts, this is an excellent resource. Good luck!