Invoice details: Across from where you put the recipient's name and contact info, include the details of your invoice. This placement makes it easy to keep track of vital information — for both you and the recipient. It doesn't matter what kind of numbering system you use, just make sure it's in sequential order so you don't get confused.
Track your time each step of the way – Time is money, so it's vital to keep track of it. It will also help you learn how long it will take to complete similar future projects. This will facilitate a better work schedule so you can tackle more jobs. Accurate time tracking will add more transparency to your billing and will help clients know what to expect when they need you to work on similar tasks later. Use time-tracking mobile apps so you can clock in and clock out right there on the job and not have to estimate your work hours once you're done.