I'm a bit of a word collector.
Here are a few I like.
Nope, used as a verb. As in: "The zookeeper tried to convince my friend that garter snakes are harmless, but she rapidly noped on out of the room." The word nope amuses me. It's friendly, but emphatic. That, I think, is the best way to negate anything. The word nope always reminds me of part of this hilarious comic.
"And now that you know that you don't have to be perfect, you can be good."
John Steinbeck, East of Eden
Calamity. I really want to start using this word to describe even small things that go wrong. It just sounds disastrous, and is more creative than saying "disaster" or "bad occurrence."
"No project is too ambitious if you crave the result enough"
Kay Gardiner and Ann Shayne, Mason Dixon Knitting
"Make good art."
A reminder from Nial Gaiman's graduation address, which is one of my favorite speeches of all time.
"I'm a writer. I give the truth scope!"
Geoff Chaucer, A Knight's Tale
Winningest and indubitable.
These are two improbable words. I place them together as reminders of my fallibility. For the first, when a substitute teacher in middle school used the word, I emphatically denied the possibility of winningest being a word people used, and strongly suggested he use a less absurd phrase like "the _____ who won the most." I was wrong. Winningest is a word. I still don't like it. For the second, I convinced a classmate in highschool that the correct word was undoubtable, and that indubitable must be a silly way of saying the same word, while not being a word itself, because that would be redundant. I was wrong. Both undoubtable and indubitable are words. I must say, I like indubitable more. It's more fun. So my verdicts on words are not based strictly on whether or not I wrongly accused them of not existing.