Always use an editor with color syntax highlighting. About 20 years ago I spent 3 days and nights debugging something that was a simple typo error. Since then I always use an editor with color syntax highlighting.

20 years in the game?! I'm humbled.

What language was it?

Turbo pascal had syntax highlighting 1987 and 1990 visual basic came, also with highlighting.

On linux I think vim had the same around then to.

@Voxera it was HTML/PHP. And I indeed started using vim shortly after

@Rocco I like vim, it was for a long time the only editor to highlight embedded variables in php strings.

But I do lack modern ide's intellisence.

Oh my, your avatar looks so young ;)

@theScientist well they do but you can almost always find one with highlighting. Intellisence is not as common in editors, thats more of an ide thing.

But when I have to do something on one of the linux machines I do not have any good ide to work with so its vim for the win ;)

I am color blind.