One Thousand Ways to Make Money by Page Fox

970. FORTY-FIVE MINUTES A DAY will give you a knowledge of bookkeeping

in all its branches. Let the spare time be spent in acquiring a plain, round business hand. Then master a book on the subject. After that you should offer your services free to a friend for three-quarters of an hour every day. Bookkeepers command from $1,000 to $3,000 salary.