I am taking a break from frequent emailing to avoid getting put on even more of a "kook list" by a staffer and have shifted my strategy to post cards.
I am now mailing out a post card every day. I am of course hitting up Sen Begich, Sen Murkowski, and Rep Young. I am also sending postcards to other key Senators (blue dogs and Sen Coburn, for example) as well as Rep Boehner. I bought a stack of post cards, jot a quick message, and drop 'em in the mail. I'm sending them to the DC office but also hitting each and every district office. I wrote out a stack of cards the other day and am hitting every address at least twice over the next few weeks.
Postcards are great as they are quick. Here's an example message:
"OPPOSE ALL GUN CONTROL -- NO CRIMINALIZATION OF PRIVATE SALES, NO MAG BANS, NO ASSAULT WEAPONS BAN -- NO COMPROMISE ON OUR CONSTITUTIONAL RIGHTS. I VOTE!"
You can even keep it simple and write: "VOTE NO ON ALL GUN CONTROL!"
It takes about two minutes to scrawl out a card with address so this is very effective. Plus, when sending to legislators who I don't vote for, there is no place for a return address so that can leave 'em guessing as to where exactly I vote. Sure, they may see an out of state post-mark... But maybe I vote absentee, eh?
Every Congressman and Senator's website has their mailing address. A quick google search will get you the data.