From the left of the Chatter tab you can choose a feed to browse. The default feeds include:
What I Follow - All Chatter posts in Fingertip items you follow, such as Decisions and Plans
To Me - Chatter posts where you are mentioned all across Fingertip
Bookmarked - Chatter posts you have bookmarked from the Chatter post action menu (downward pointing triangle) on the right. Save posts here for later!
Company Highlights - What are the hot topics causing a lot of discussion? Find them here.
My Drafts - Saves posts you have begun writing but haven't posted yet. Fingertip automatically saves your drafts regularly while you have the text field open.