Be sure to know who you are asking and who is asking you
LinkedIn users vary in their views on how well you must know someone before connecting to him or her, but it's inappropriate to send connection invitations to people who have never met you, heard of you, or had any inkling of your existence
Be personal in your messages
Express your personal brand in the LinkedIn summary show who you are, what you do, and why it's unique
Be active, don’t start an account unless you can keep up!
*On an account level, 25% of Twitter accounts have no followers, and 40% have never sent out a single Tweet. Put in perspective: 30 million Twitter accounts have never been updated. Taken even farther, 80% of all Twitter users have sent out less than ten tweets- MAKE IT WORK!
As a blog publisher, it is a good idea to have your feeds in your Google Reader account. The reason is that if you have these here, there is a higher chance that other readers will find your feed to read your content. Have a variety of related blogs that you also follow and mark posts that you like in the reader. This will help people find your content, which they will most likely enjoy since it's relevant to the blogs they are already reading. Read more: http://www.articlesnatch.com/Article/-finding-Related-Content-Using-Google-Reader-google-Reader---Related-Content/1062422#ixzz0kzYbwEnH
Understand that social media is not free … it takes people , technology , and time . Each of which are limited resources. Thus, if you are going to allocate resources to social media it has to make business sense… financially. Guess what? It Does! Social Media will result in cost reduction and generate more revenue .