How does it work?
Do you constantly use the same couple of files in Excel? Every time you start up Excel, you can have all these files automatically open for you! Woot! No more clicking on each spreadsheet to open!
How to make it happen!
In Excel open File -> Options -> Advanced tab then scroll down to the General section. Set the path of the folder which you want to open files from in the At startup, open all files in input box.
If you want to keep the files saved elsewhere, you can simply add file shortcuts to this folder instead of storing the file there.
Now when you start Excel, all the files in this folder will automatically open.