If you have a current cause or campaign - such as knife crime or any other - this free and easy to use tool will simplify and ensure that every Member of Parliament is aware of it.
Called the Parliamentary Megaphone, it allows you to send a message to one, some or all MPs in one go using your email address - which enables replies to be sent to you.
http://www.mensaid.com/megaphone/parliamentary.htm
Useful way to communicate with those that should be pressing for work, change and action to cure our problems and improve our society. Hope this doesn't get shut down because it gets too popular!
(Someone contacted me anonymously to highlight this is a tool that should be credited to equality charity Men's Aid. Happy to do so. Not sure why s/he wanted to be anonymous but that comment is attached to this post.)