Want to learn how to switch from open apps quickly?
Using this combination of keys will allow you to quickly go from say, Word read a value, switch to Excel type the value, and back again. All without using your mouse.
When you have multiple windows open and you want to switch between them quickly, hold the Alt key then press the TAB key. Keep you alt key pressed as you continue to press the TAB key repeatedly. You will be cycling through the programs or windows that are open.
To select another window, focus on it with the Alt + TAB then release the keys.
Now you can switch from any open app to another with ease.
Try it and let me know how it works out for you.