Passion/Drive/Motivation=Not Eternal, Not Always
For eg one day you might wake up saying to yourself 'Enough is enough, I am going to exercise regularly and shed all this fat'. Your motivation enables you to do this for three to four days and boom, you are back at where you started. Because motivation or drive ended.
Cultivate Self-Discipline. Motivation is overrated. Stick to the task, no matter how boring or annoying or taxing it may get, until you see it to its competition. And when its completed you will feel happy, that it was worth it and you will feel motivated again.
So motivation is like a head start. You can't go all the way with it. Plan you work, divide it into little tasks and then do it little by little.
Make a must-do list. And write on it, things that you must absolutely do. Don't write all the things you need to do, just write on it what you absolutely must do today before you go to sleep.
Hold yourself accountable if you miss your schedule. And reward yourself if you meet your targets. But take note not to criticize yourself if you fail to achieve your goals.
Treat it like a game. You play to win, you may fail a level or two while doing it. But you win the game, with tenacity.