I prefer email for all communication, and you can email me at this address: firstname.lastname@example.org
If you use a Jabber/XMPP chat client, you can use the same address to chat with me.
You could also leave a comment on one of the blog posts and it will get to my email, but your message will be publicly visible.
You can also send physical mail to me, use your internet searching skills to acquire my physical address. (I have about three, but any one of them will get to me eventually.)