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Good post, the fundamentals for switching folders is important. I just have a suggestion to add:

cd -

This command makes it pretty easy to jump between folders. For example you executed the following:

cd ~/custom
cd ~/another/folder

executing cd -now would bring you back to ~/custom.

Sadly only few people now this command. But more or less everybody likes it after I showed them. :)

neat, didn't know about that one.

Yes, thank you. I knew about that, but I always forget about it.

Such tutorials on the basic and foundational level are important to know if you get yourself in a pickle. I know I saved my butt a couple of times thanks to these. Cheers!