In LaTeX, to create line breaks, the correct command is "\\" rather than "//". The "\\" command is used to insert a line break within environments like "aligned", but it does not start a new paragraph. For paragraph breaks, users should avoid using multiple "\\" as it can lead to warnings like "underfull hbox." Instead, commands like \bigskip, \medskip, or \smallskip are recommended for creating vertical space, as they are adjustable and disappear at the end of a page. Some users experienced issues with the "\\" command not working initially, but rebooting their machines resolved the problem. Overall, the discussion emphasizes the importance of using the correct commands for formatting in LaTeX.