Log into Diigo at http://www.diigo.com.  Watch the Research and Share Videos.  

Highlighting

When working with others, each partner should choose a different highlight colour.  Click the drop-down box to choose yellow, blue, green or pink.

Sticky Notes

Once someone has started a sticky note, you can add to it.

Click on My Network to continue the conversation.

More helpful info (scroll to the bottom)  What is Diigo?