The Firearms Policy Coalition has set up a page that lists each firearms-related bill that has been introduced into either the House or the Senate in the 113th Congress. It gives a brief summary of the bill and whether they support or oppose the bill.
You are probably saying to yourself, “So, you’ve been doing something similar”. Yes but their page contains a link for each bill that allows you to send a comment on that particular bill to your Congressman and Senators. If, for example, you just want to send a comment that says, “I oppose S.150” you can do that. However, if you want to personalize your message – and you should do that – it lets you do that.
In addition to sending a message to Congress, the link also tallies your response with other respondents for the website PopVox. For example on the aforementioned S.150 – Assault Weapons (sic) Ban of 2013 – PopVox shows 97% of respondents oppose the bill.
I am all for easy if it looks like it can be effective. Given that you can personalize the message, I think this can be effective.