Help, anyone?

I have just realilzed that I have no idea of how to send someone a message. I think I used to know how to do it, but I must have forgotten or something-- Oh wait, I know what it was. I was looking at followers, and I clicked someone's picture and then I saw the message button, but other than that I'm lost. xP Can someone help me out with this? I'm still new, y'know. u_u;;; And yet again, I was going to say something else, but Blogger hates me, so whatever.