12 examples to decode man pages in Linux/Unix

I feel man is one of the frequently used command along ls and cd commands in Linux. Have some more which you think we use frequently then post it in comments. Many people who are new to Linux do not know its potential. They just read a man page for a specific command and go away or just use ???man command???. This post is mainly meant for newbies to Linux/Unix. Do you know there are other commands which are similar to man command? Below are the list of commands which I call cousins to man pages.