The maximum length of the password in Steam, and where to store?

Hi. I now have to Steam a long password, made it one to definitely not hacked as it was with me. Last account back and failed. On the new set a complex password, tied everything to him and now I have accumulated more and more games want to make the password even stronger. In this regard I have a question. What is the maximum length of password for Steam, passwords and how difficult you are and advise safest place to store passwords from resources?