The NYT has a fun piece where they asked different people what they would do if they were president. It's worth a quick read, but as you do, its worth wondering whether what they propose is actually feasible. While we tend to think of the president as one of the more powerful - if not the most powerful - positions in the world, we forget that the office exists within a system of checks and balances. Presidents do not have magic wands they can wave and make things happen automatically.
Its also worth remembering that before one can be president, one has to have the political skills - or connections - to become president.