Your most important documents are your invoices - without a regular crop of these there will be no income and your business will cease to exist.
We can issue your invoices on an invoice of your design. They can either be posted or emailed. And from there, accounts receivable can be tracked and reported. Most clients take responsibility for pursuing late payments but this can be done in-house as well.
The same applies with the bills you receive - these can be entered weekly or monthly and accounts payable reported to you as you require.
All these are part of cash control - essential for the survival of your business.