You’ve probably heard of the “grep” command, but did you know about ripgrep? ripgrep is a “line-oriented search tool” that you can use to quickly find text within files, with additional features. Also, a few tools from the “Modern UNIX” suite are discussed in this video as well.
Do you know where your most-used files and directories are? Sure, there’s more than a few commands you can run to find out, but ncdu is a great tool for this purpose. Using ncdu, you can scan your entire hard disk (or any mounted filesystem) and determine where your storage pain points are – and take action!