Cheatsheets-and-tools

Powerful tools (You must try to use them)

https://www.google.fr
https://duckduckgo.com

Bibles:

https://inventory.rawsec.ml/resources.html

https://github.com/zardus/ctf-tools

Big passwords lists (most populars)

https://wiki.skullsecurity.org/Passwords

Useful websites (full of writeups and more)

https://0xswitch.fr/

https://www.dailysecurity.fr/