We are all told to have hard to decipher unique passwords and logins for each system we use. Whilst finding this process quite tiresome, I think we all find that we wish we had a little book that we could just write it all down in! No!!! This is probably no different to having it on post-it notes on your monitor!
Just last year Hipchat a chat portal detected a security incident around a web server, where a vulnerability in a popular third-party library used by HipChat.com occurred. It would be safe to say then not to save passwords to online chat portals. It is also sensible to say that you can only hold so many combinations in your head before you start to lose track and trying to work out the secure combinations isn't going to be easy.
The good news is that there are plenty of tools out there at the moment which offers you somewhere safe to store your passwords and then you only need to remember one password, which is the password to log into that account. Remember to ensure though that you are working with a reputable company as they will have access to everything you do and own online so make sure you've checked them out thoroughly!
Also, remember that with the GDPR Regulation coming into force on 25 May 2018 it is your responsibility to keep the data you hold secure, so keeping those passwords safe has never been so important. If you suffer a breach and you are not complying with the regulation, then you could face penalties of £500,000 with an upper limit of €20 million or 4% or annual global turnover – whichever is higher.
Remember Keep your passwords safe! Certainly not on post-it notes or "the little black book of passwords"!