The Ribbon. Borrowing liberally from Office 2007 and Office 2010, SharePoint includes the Ribbon, a panel at the top of the window where almost all of the functions possible on a given page are grouped and displayed. Most SharePoint pages have the Browse tab turned on by default, which gives you a breadcrumb-style hierarchy. In other words, it helps you to navigate among pages on the site and see how you arrived at the current page. The Ribbon is also context-sensitive; it shows you different options depending on where you are within SharePoint. So if you're in a document library, the Library Tools Ribbon panel will appear; if you're in different types of lists, other tools will show up in the Ribbon.
The Quick Launch bar. Running along the left side of your SharePoint Web page, this bar helps you jump among the various parts of your site, including to different lists, libraries, discussion areas, picture collections and the site Recycle Bin. (This works exactly like the Windows recycle bin except it holds items from the SharePoint site only.) Another option is to see a full tree-like view of all the places on your site.
The Search box, where you can type in any sort of search query, click the magnifying glass icon to the right and then take advantage of the indexing engine on the site to get comprehensive results from any file that includes your search term.
Creating a document library
From the Site Actions Menu, click "New Document Library."
The most common use for SharePoint is as a document repository. You and other team members and colleagues can put documents and files all in one specific place, accessible to everyone, and then avoid the all-too-familiar email blasts with Word documents attached.
(I would wager that if you never saw another "please disregard the previous message, I've attached the correct newest version of the file here" message pass through your inbox, it would probably not be too soon.)
You can then simply email hyperlinks to documents on the SharePoint site when collaboration needs to happen. As users modify and update files, the latest version -- as well as previous versions, if you wish -- along with all of the history of who revised what, and when, is stored in a single place.
To get started serving up and sharing documents and files in SharePoint 2010, you will probably need to create your own document library. This is fairly straightforward.
Uploading and interacting with documents
Once you're in the document library, you can very easily upload new content to the library by clicking the Add Document link at the bottom of the middle pane.
Uploading new content into your document library.
When you do, the Upload Document window appears.