If you wanted to get stronger you’d lift weights in the gym, right? You’d research the best methods, create a program and start lifting heavy things.
The process is simple. Lift enough for your body to be extremely uncomfortable and it will adapt. Do it again and again and adaptation will create muscular gains.
This is the same way we build a strong mind. What’s more is that you can do this with everything, not just in a gym.
The whole world and your experience within it is a chance to stretch your comfort zone in thoughts, deeds and focus.
Regular training of your mind will give you powers beyond belief and there's a whole world of free resources online for you to do it.
Mindfulness, brain training, concentration games, you name it.
Think about what you could become in a year if you put in the work to develop your mind with the same intensity that you approach your body.