LinkedIn
LinkedIn is a contact networking service that allows you to be introduced to people known by your network. It was originally designed for business and professional use. You can set up a profile for free, but cannot effectively search for other people unless you upgrade to a paying account ($25/month minimum). Paying accounts can contact a few people outside their network each month, but any additional "inmails" are $10 each. If you want to use LinkedIn without fees, the best way is to accumulate a large network. You can also ask and answer questions on the site - which will increase your visibility on LinkedIn.
Click here to get a LinkedIn account
Post documents to your LinkedIn page using SlideShare
SlideShare is a free application you can add to LinkedIn and Facebook that allows you to post documents (.doc,.ppt,.pdf, etc.) to
your pages. People can click on the document and download it for share it with others. The documents you post to SlideShare are indexed by
GoogleAlert, so people outside your friends may have access to them.
On your profile page, click on Applications and select SlideShare.
Put link on your email and website that sends them to your LinkedIn page
Below is a tool to create an invitation to add your name to their LinkedIn network. You can copy the results and paste it in your emails.
To use this tool, you must have a LinkedIn account and know the shortcut.