Create a new work sheet to the right of the active work sheet with Shift+F11. Need two or more? Select the number of work sheets you need, and then use the shortcut.
Enlarge your screen real estate quickly by collapsing the ribbon to only tabs by selecting Ctrl+F1. This is very handy when you want to see more data than ribbon!
Locate or quickly clear all cells with comments using Ctrl+Shift+O. Great shortcut if you’ve hidden all comment indicators.