How can I get emails I receive in Gmail attached to History in Salesforce?

Cirrus Insight enables Gmail users to log received and outbound emails to Salesforce with one click.  it also lets you view and update Salesforce data without leaving Gmail.  Here's a demo video on Youtube: 

It's the top ranked integration between Salesforce and Gmail on the AppExchange: 

It's a quick and easy 30-second install and we have a 30-day free trial: