One of the important features to add to your blog is your contact information.  It is understandable that many of us don't want to post our phone numbers or mailing address as this would result in our phones and mailbox being bomarded with spam.  However, an email address is a necessity.

Additionally, your email address needs to be easily visible either as a tab, icon or link on your home page.  I frequently wants to contact fellow bloggers for guest posting or feature blogger opportunities and it is unfortunate when I cannot find an email address for those bloggers.  I don't feel comfortable posting my opportunities into a blog post.

Also, I am frequently contacted by companies with opportunities of free products and services.  If I didn't have my contact information displayed on my home page, I may have missed out on some great offers.