A quick way of opening workbooks you use most frequently is to pin them to the Recent list that is displayed when you first start Excel 2013 or when you click FILE from the file menu.
To pin/unpin a workbook start Excel 2013.
The start-screen interface is displayed and a list of your recent workbooks is listed on the left hand side.
Hover your mouse over the Workbook you want to pin and you will see a small pin icon.
Click the icon to pin the workbook.
The Icon changes direction and a line is drawn to separate the pinned workbooks from the recent workbooks.
Now each time you open Excel 2013 you will see this workbook listed at the top of the Recent list of workbooks.