By far the most valuable tool for any home improvement business is a Client Relation Manager or CRM. Products such as https://buildertrend.com/ will completely change your business. CRMs can store your leads information in an online cloud that can be accessed from your office, your home, or your cell phone. When the lead is converted to a customer you can log all information for the job, the product selection, the costs, and more all in one database. No more paper, no more folders, and the ability to track every dollar in and out of your business. P.S. If you own a roofing company look into the CRM https://acculynx.com/.