Be at the pains of putting down every single item of expenditure whatsoever every day which could possibly be twisted into a professional expense and remember to lump in all the doubtfuls.
Source: In The Ultimate Success Quotations Library, 1997.
-- Hilaire Belloc, (Jul 27 1870-1953), English writer, poet; He was one of the most versatile English writers noted for his light verse, witty children's poetry.