The User Control Panel offer some great features for registered members, for communicating with other members and customising the forum the way you like it.
Below is a short video of how to organise your PMs, thanks out out friend Debater
It's well worth watching as it can make life a lot easier for you:How to access your control panel, set up a folder of your choice and write a rule which will make any pm from a certain member go directly in to the folder you set up and also how to send a pm