It sounds like a paradox. You must go slow to go fast. It comes up in many disciplines. Race car drivers know that when entering a turn, they go faster when they slow down going into the turn. In martial arts you start by going slow in order to learn the moves and be able to do them fast. The same thing applies in your business.
Businesspeople tend to rush into things, get them done as quickly as possible, and rush off to the next task. This can lead to sloppy work, errors, and having to correct tasks and repeat them. This slows down the work. Worse, an error early in a project can lead to having to redo an entire project.
Take your time. Give each task the time it requires.