What is the best process of mind development?

[Answered in Quora, July 2019]

Good that you thought about that! So, you are enriching yourself. Love yourself first. I mean visualize you like a superhuman.  You are aiming to show capabilities to take quality decisions; quality defines long-term value and scope of influence.  You will be showing good indications to day to day life. Like speed reading, enhanced intuition, reading a person, memorizing incidents (may not be people!) and ideation.  
OK. target is visualized. Just take the case of taking faster decision with high quality. Including weighing the context, you need to have different abilities. In a nutshell, you wanted to earn expertise without undergoing the actual experience. Knowledge and analytics skills are the two main pillars of this expertise. Knowledge has to be gained either from known facts published by people or by experimenting by yourself. Both need time and discipline.  More than reading, conversing with the right people will help you to gain knowledge. It is very rare that you could find a job that will give you an opportunity to expedite this process. So, balance availability of time-based on your financial situation. Also, show confidence to switch departments/projects in your paid-job too; thus gain maximum knowledge in a shorter time period. Experimenting with things on a wider canvas is the right way to study different aspects of the business. Thus your analytical skill is improved by finding the commonalities. You will be known for Out-of-the-box thinking in your organization/profession. Do not rest at that point!!. Switch…! To others, you are taking a foolish decision. But you are in the process of developing your brain. 
During this time, develop a method to augment your memory. People tend to remember things in a special fashion. we are not writing an exam by byhearting the texts. So, be comfortable if you forget the details. The important matter is to find methods to get a keyword quickly. The keyword should be a link which leads to a bigger document. it could be your journal entry. or it could be a mind-map.
Then do not forget to invest in the hardware! Take care of your body which hosts you. Fitness, meditation, nutrition.. focus on these. Then your question is not related to the outside world.  But it is true that you can take from the people you trust in their abilities. So network and rank good people. They will resonate you in the process of mind-development and also, they will help you when in need.