Once you start working on something new, you take time to learn the task. Then come some hidden challenges which you need to overcome. This is called learning experience.
Once you have gone through entire learning curve, you see yourself doing the same task every day. Then your smart mind starts looking for ways to do that task quickly and efficiently. You try to implement automation, you start typing faster, you keep your check list and SOPs up to date and handy. You use reminders and alarms. This is how you achieve productivity eventually.