Are your sales great but no one pays anyway near on time? A great way to turn this around is using direct debit. Then everyone is happy.You get paid at exactly the right time. Your client never has to make the effort to pay you. A win all round! There are several direct debit companies around or check with your bank.
The 7th day of the month is a great day to review your accounts for the previous month and year to date. Doing this is a reality check to see how revenue and expenses turned out compared to budget