Actual Cannibal Shia Labeouf Mod for L4D2 is essential.

So many people just open a game and play it, ignoring the settings.

The default controls in StarCraft 2 set you up for failure in custom games. Turning off simple command card and allowing the selection of enemy units helps a ton.

When playing interactive story games like until dawn, try to pick up everything in each room before continuing. Be nice to the animals!

Breath of the wild is more fun if you do the major dungeons in reverse order.

When playing with emulators let the game go through its idle intro card and listen carefully to the sound if it distorts or pops then your game is likely to be unstable try changing more options. Such as enabling interpreter mode for the audio.

When playing Super Mario World, don't be afraid to explore the stages esp the boo mansions.

When a game offers Vulkan/dx12 mode, try it.

The Nintendo switch allows you to control the MTU of the wifi connection, adjusting this can help in poor connectivity situations.

Changing your DNS to a public provider such as Quad9 can help.

Investigating if you can enable ipv6 on your network can offer you some boons.

Confirming port forwarding is working for your games will help immensely in games that rely on that. (Also resolve any double NAT issues)

Do not attempt to game on a wifi repeater, only sadness follows.

Unless you are playing fallout 3 or New Vegas on era correct hardware there are mods to make it more stable.

Everyone needs to play hat in time.