Enable Hot Corners
Hot Corners are quick shortcuts attached to each corner of your Mac’s display. It’s more useful than it sounds — you can start or disable a screen saver, launch Mission Control, or put the display to sleep very quickly with Hot Corners.
All you need to do is hover your cursor over one of the corners of the display to activate that shortcut. You can set up Hot Corners by going to System Preferences > Mission Control > Hot Corners. There’s are four separate shortcuts you can enable, one for each corner of the display.
Accidental triggers can be annoying. So, try holding down the Command or Option key when selecting an option from the Hot Corner dropdown menus. This will add a modifier key — meaning you’ll need to hold this key down and hover your cursor over a Hot Corner to activate it.