- Solid editor: I've used a few editors and IDEs in the past. I think a learning to use a programmable editor is a better investment than learning to work with

- Solid editor: I've used a few editors and IDEs in the past. I think a learning to use a programmable editor is a better investment than learning to work with an IDE. IDEs are generally single purpose: working very good for a limited selection of languages, platforms, etc. Having a good editor at your disposal allows you to manipulate any text oriented (and sometimes binary) format. When your editor is programmable and has an active community, you can probably find a plugin to solve your problem more effectively or write something yourself, with your editor! With all your customizations in code, you can manage your editor in the same way as you manage your products: source control! This gives you the possibility to improve your daily working environment reliably and iteratively. IMO, Vim and Emacs are both very good options. Both were created decades ago and still have very active communities. Personally prefer Emacs and use vim on occasion for remote work. - Learn basic vim and emacs keybinds: most interactive shells use readline (or similar) library. These shells often have emacs keybindings by default. Vim is often the alternative option. This was an eye opener while learning emacs: suddenly I started to understand how to efficiently navigate any shell, even remote systems, without configuration! - Tcl: Easy to learn, hard to master and powerful! Syntax and semantics can be explained in 12 bullet points[1]. Bundled with the native tk library, its my goto language for quick-n-dirty GUI tools and prototypes. The "every thing is a string" principle makes it extremely flexible. Apart from quick-n-dirty, it's also used for stable tools such as expects, gitk and environment modules. Even sqlite and redis started as tcl scripts! - POSIX shell scripting and core utils: write once run anywhere. [1] https://tcl.tk/man/tcl/TclCmd/Tcl.htm https://tcl.tk/man/tcl/TclCmd/Tcl.htm