"Don't have the editor/IDE insert the parens/brackets. Have it check them for you. Emacs can do a momentary highlight of the opening paren/bracket whenever you

"Don't have the editor/IDE insert the parens/brackets. Have it check them for you. Emacs can do a momentary highlight of the opening paren/bracket whenever you type the close of the pair." NO. Sorry but you're doing it wrong. Relying on the editor to highlight parentheses is a highly inefficient and error-prone way to work. It's distracting, it wastes mental cycles and inhibits flow. The correct way is to configure emacs so that when you press a certain key (in my case, right shift because I configured my keyboard so I can activate left shift with my thumb), emacs inserts "()" and puts the cursor in the parentheses. No need to remember or count closing parentheses this way. It's been a really long while since I last counted parentheses for ANYTHING. Like, let's say I write a let with one variable, and the value is a really deeply nested expression and now I'm done with it and I want to write the body of the let. What do I do? I DON'T COUNT PARENTHESES. I go back to the opening parenthese for the variable declarations of the let, then I skip over that form (the variable declarations) with C-M-f (forward-sexp), right to the body of the let. Then I use C-j (newline-and-indent) and then I can write the body of the let. (if the value form is really long I might skip a few parentheses and use C-M-b to get back at or near the opening parenthese of the variable declarations). So, executive summary, you walk the structure but you NEVER count parentheses. Like, once every four months I might screw up and delete a parenthese and then the editor and me are both pretty confused, but it's such a total non-issue. And even then, I don't count parentheses a lot because I try to walk the structure by skipping over forms and see what works and what doesn't, and I might tell emacs to reindent some of the code and I immediately see what's wrong. With a proper structure editor, unbalancing the parentheses couldn't even happen.