Good records begin with a consistent routine. Keep business and personal transactions separate, and store invoices, receipts and supporting information in a way your team can follow.
Reconcile your records with bank statements regularly. Record missing information and questions so that they can be resolved while details are still fresh.
Discuss the reports you need with your accountant. The purpose is to produce information that supports practical decisions, rather than maintaining records without a clear use.
This article provides general organisational information. Professional advice depends on your circumstances.