I don’t have a favorite purchase, but I can say that there are material things worth investing in. Everything we buy to improve ourselves physically, mentally, and emotionally are the best investments we can make—of course, as long as we can afford them and they don’t significantly affect our finances. A gym membership (as long as we go regularly), books, education, the moments we share with our loved ones, and the trips we’re able to take are the best things we can invest our money in.