You've been given some sound answers but I have a couple of more starting with a.) DON'T GO BUYING NEW TRICKS BUT RATHER, INVEST IN BOOKS. This is one of my top pet peeves in that books, for the dollar ventured, will give you far more material to work with than any video and especially any overpriced POS that's on the market (let's face it, 90% of what we all buy ends up in a junk drawer or on a shelf collecting dust), we buy it so we know how it works, that's it!
Learn your basics and you will be able to do miracles on the spot with borrowed objects this is one of the things that Bill Malone built a reputation at back in the day.
Part B, on my list, is that you learn alternatives.
This past Saturday a friend of mine was playing with a set of gaffed chinese coins he'd just purchased for doing Coins Across. I mentioned to him that I'd never used shells or gimmicks or even an extra coin for doing that routine. He didn't know that this was possible and in truth, there are probably 6 standard ways to do this one effect. So learn two or even three so you can change up on folks when they ask to see it again. I'll typically do the standard hand to hand and then do the hand to glass variant. Then again, it's been close to 20 years since I've done that sort of magic. . . but even in Mentalism, I change up on what I do and how, it's a habit that distinguishes the real Magician from the wannabe.