Getting first round draft pick
When in Franchise mode and after all Week 17 games have been played (including your own), trade all of your draft picks to the worst team in the NFL. When you have traded all of them you will have the first pick of every round instead of whatever you have. Note: This only works if you have turned the trade deadline off before starting your franchise.
Good Players
Turn off the salary cap. Before you start a franchise, go to "My Madden" and set all of your players' stats all the way up. Then, save the roster. Go to Franchise mode and start a new one. If done correctly, you will start with all of your good players. This also works if you trade for good players.