In my opinion the best way to contact me is to leave a comment on any blog post, especially if your comment or question pertains to a post.
But if that doesn't work for you, below are some links. For the quickest response I would suggest using the Email option. I rarely use Twitter so you could @ me but it might take a while for me to see and respond to it. Same thing with the Google+. I don't use it very much so the response will probably be delayed.