Here are the bookkeeping fundamentals that save small business owners the most pain: Separate business and personal money. Open a dedicated business bank account and run everything through it. Mixing the two is the single biggest source of messy books and tax headaches. Record little and often. Set a fixed cadence — 15 minutes weekly beats a panicked scramble at year-end. Transactions are much easier to categorize when you still remember what they were. Go paperless with rece