The phrase "personal reality" has a range of meanings, and most people would begin with their situation, the place where they find themselves. There's a natural impulse to improve the situation, whatever it happens to be. If your situation lacks enough money, satisfying work, a loving relationship, and so on, it will improve your personal reality to work on those things. That's about as far as society tells us we can go. On a larger scale, one person can make a minuscule difference by casting a vote for President or deciding to recycle, but big or small, personal reality has a big outer component, consisting of the external world, other people, natural forces, and so on.