If you're lucky enough to get money from your writing, what should you do with it? Margaret Wise Brown, author of Goodnight, Moon, has, to me, the best answer ever. In 1935, she sold her first book, When the Wind Blew:
“When the check for her royalty advance came in the mail soon afterward, Margaret cashed it immediately. Horse-drawn flower carts were still a familiar sight in the Village; fresh from the bank, Margaret hailed a cart, told the vendor that she wanted to buy everything he had, and directed him to her front door, where the entire cartload was deposited. She decorated her apartment, then called her friends over for a party”
From Awakened by the Moon, Leonard Marcus, 1992.