Put up a character ad here! We're all too lazy for plot pages these days so a simple post about your character, what they need, etc. is all we really require. Go ahead and make them pretty but remember to credit whatever you use, eh? Otherwise, plot away. Make some crazy things happen.
You can track more than just phone calls, e-mails and people these days. This, friends, is called thread tracking. This way, you don't get lost amongst the sea of threads that you might be involved in. Cue, organization.
Is there someone you need? Make a thread here with your specifications for needed characters. Try to give as much detail as you can to make it easier for fellow members and guests to see if they're up for it or, you know, leave it mostly open so whoever wants it can be free to do what they will. It's all up to you. Lastly, this forum is guest-friendly for the purpose of claiming characters that you want to apply for. There'll be absolutely no advertising here.
Notes, e-mails, instant messaging... we're all technologic these days so come here to communicate in all your high tech glory. Tag it if it's for someone and, er, try to make how your communicating obvious. Don't go about intercepting stuff.