Normally, to access a work-item in TFS, we must select Work Items node, choose the queries containing the list of work-item, then find that work-item.
Since doing so is very time-consuming especially when the number of work-items is large, or the tfs server is slow etc.
In Visual Studio 2010 can support the Work-Item Tracking toolbar for quick access to work-items by their IDs without having to make many steps as above.
Right click an empty space on menu bar in VS 2010
You must be logged TFS
Click arrow button or
Select the TFS queries node and press Ctrl + G.
Type the ID of the task needs access.
And you will see your item opened.
Hope that this post is useful for you!