Practice really. I occasionally still get something like 31cl wrong, but just undo and do it right (e.g.: 33cl). Note that, by being off by just 2 or 3 characte

Practice really. I occasionally still get something like 31cl wrong, but just undo and do it right (e.g.: 33cl). Note that, by being off by just 2 or 3 characters, I can quickly ~~recount~~ add. Usually, I'll get it right if it's under 30 characters, and will be off by one or two if it's between 30 and 50. For normal code though, counting words is way quicker (e.g.: 7cw). When it comes to rows, `relanumbers` helps a lot, there's no going back. For larger chunks of text, things like `cif` (change inside function) and `co{` (change outside brackets) help a lot. Again, practice and keeping them in mind. Also, every time threads like this appear on HN, I learn new stuff. Like, somebody mentioned using `c/X` (change, search, X). Gonna try that next time I need to replace all text leading to X (which is pretty common).