> Try to avoid installing CIA files to sysnand (meaning only emunand). Not that it would mean a brick right away but it's safer but less knowledgeable ppl still starting.
> If you can, get CIA games from your console's region (not a strict requirement since other regions work too but it makes it easier for you with some things like updating the game when necessary).
> Don't go crazy when installing stuff. You can install a lot but that doesn't necessarily mean you'll play a lot. So be moderate about it. (personal advice, you can ignore if you want)
> Poorly constructed CIA will most times be unable to be installed so no need to worry a lot about it. If a black screen or a freeze screen does show up after installing a CIA, ask about it and don't worry. Usually rebooting the console gets you back to normal.
> Always pay attention to what you're installing and get your CIA files from good sources. Pay attention to the feedback from other people in such threads when they exist.
> Make backups of your emunand with emunandtool from time to time so that if something ever happens, you have a quick way to restore it back to how it was.
Not much more I can remember