As to limiting the paperwork and pushing things into the 21st century, I use Trello.com.
We started out just keeping a list of job on there so they would be easier to track instead of using a dry erase board and post-it notes. It worked so well we expanded it and now track every job as it progresses through a series of drop-down lists.
Every job gets a card. It starts life in New Work Orders. When one of the guys goes to the job, he will move the card to the appropriate list with notes and pictures added. It may go to Completed, letting my admin know it needs to be invoiced. If it needs parts or to be quoted, it will go the admin's or my To Be Quoted List or to the Needs Parts list letting us know it needs to be quoted or have parts ordered. From there it goes to the next step, Parts Ordered or Parts Received. Eventually, all the cards end up in Invoiced or canceled and then are archived. The entire system is searchable so if you want to know what you did on a job or service call a year ago, you can find it and pull up all the notes and pictures that go with it.
The end result is no lost notes, no lost job paperwork, and fewer return trips to check forgotten details. Job notes are photographed and uploaded along with pictures of what needs to be done. Everything the company is doing or needs to do is available at a fingertip. If a customer asked a tech a question the odds are the tech has the answers the customer wants without making a call to the office. Likewise, if a customer calls the office I know almost everything my employee does about the job and I know it immediately instead of when the truck gets back to the shop at the end of the day.
The lists. This page is up on my computer at all times. It has all the information that everyone in the company needs to do their job, including me. No confusion, no I forgot. Any employee that goes to any job is required to update the card for the job with what they did as well as attach photos if required.
This is a sample card. This particular job was to replace a rusted out floor closer with a surface closer and continuous hinge. Everything I needed to quote the job is in the card. Even if the employee that first looked at this job doesn't do the work, whoever shows up will know everything they need to complete the job.
The calendar function I just added. While everything above is available for free, you need a subscription to use the calendar function. It also frees up some other options I haven't explored yet.
With that in mind, the dry erase board went in the trash and a cheap TV was installed in its place with a $100 micro PC driving it. That gives me an easily editable calendar that is visible to everyone in the company when we meet in the mornings to get the day started. They can also access this information from their phones through the Trello app to view, update, and move cards as needed.
All in all, it has made life a good bit easier for everyone. I don't have to dig through a pile of notes or files to find information or wonder if the information was left in a truck. My employees have all of the information they need to do a job and don't have to keep up with every job note they generate. My admin knows what needs to be invoiced and when as well as the status of every job if a customer calls. And most importantly, nothing falls through the cracks.