Little things that help me use linux. Also for my own future reference.
Add this to the command line argument while opening a program (like brave, discord, etc). Credits and details.
--enable-blink-features=MiddleClickAutoscroll
Set up and use kmonad. You can also set it up to have 'layers' on your keyboard which is very handy.
Switch to Nemo or Thunar (or whatever you like) file manager instead of Nautilus if you use gnome. And set it as default using this command.
xdg-mime default thunar.desktop inode/directory application/x-gnome-saved-search (or)
xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search
Though it still doesn't set it as default for when you open a file manager through 'Save As' or 'Open' (or etc) from another application. Feel free to contribute a fix.
Using touchegg. It may be pre-installed on you OS and you can just configure the config file (potentially located at ~/.config/touchegg/touchegg.conf) with the help of touchegg's documentation. Or more easily using this GUI app for touchegg called Touché.
Depending on your distro, the play/pause shortcut might not work how you expect (say, only controlling one program and not the last used one. This was the case with me on Linux Mint 21.1).
You can use playerctl and set up the daemon and custom shortcut for playerctl play-pause command to control media flawlessly. This ofcourse also works for previous, next or whatever.