One I struggle with is the difference between "affect" and "effect". I stop and ponder whenever I need one or the other, and I'm never confident I selected the proper word.
Same here.
also: further and farther.
Normally, “affect” is a verb and “effect” is a noun. It seems so many people misused “effect” as a verb that it came into popular usage, but they certainly don’t mean the same thing at all.
To “affect the outcome” means to have an impact on it.
To “effect an outcome” means to produce a result.
That’s one we all knew at one time, but after hearing them misused/confused so often, our confidence does sag.