A great way to gain better efficiency in all aspects is to complete technological Researches. Your scientists are working tirelessly 24 hours a day to accumulate Science Points which allow you to uncover new technological secrets of your choosing. Improving your Scientific District will not only unlock new technologies to Research but also expand the pool of available Science Points you can acquire.
Each Research takes a certain amount of Points to be unlocked, but once researched the bonus is added instantly to your Base statistics. In order to get the more powerful researches, you must go through the earlier ones first. Don't forget you can boost the work of your scientists and accumulate points even faster by using the Science Boost item.