More precisely for laptop specific use, clicking both the right and left click buttons will do the trick.
On that note:
windows + L to switch users
Windows + E opens explorer (default loads to libraries but can be changed to load my PC)
Windows + X will show a list of useful things that can be accessed by one letter (example windows + x then k will open disk management)
There's more, but these I use most often.
For Mac - I survive on keyboard shortcuts
Command q - quit program
Command w - close window
Command h - hide current app
Command tab - toggle through apps, hit the tilde symbol above tab to move in other direction
Command + number - change to browser tab #
Control + tab - switch to next tab
Command + tilde - switch to next window in same app
Command + n - new window
Command + shift + n - new folder