This is one of the biggest lessons you'll learn in recovery (and perhaps non-recovery general life improvement). It doesn't have to be a long car ride or reading. As unique individuals, what causes that 'momemt' will be different for different people.
If you're struggling, the key is to find the things that make you lose yourself (NOT drugs!). Easier said than done, don't get me wrong. It's half the battle, maybe the (figuratively) bloodiest part. You have to work your butt off Every.Single.Day. 24/7/365. No weekends, no holidays. You have to explore. You have to want. You have to push yourself to do just get up and do it.
The cool thing about recovery (or self-improvement), though, is that, over time, the effort requirement will decrease. That is, gradually, it won't take as much effort. Eventually, it won't take any at all (or any more than average, at least). But it's a process and won't take overnight so don't expect it to. Like anything else, hard work pays off and you will reap the benefits if you work hard enough. Just don't give up. You are not alone. And you will get there. Just believe. (And work your ass off. Daily. Hourly. Minutely.)
Find the calm, the inner peace, the passion. It's in there somewhere. Keep on doing this. Eventually, that state of mind/being will become habit and you will be reborn again into a happier, more peaceful, more productive life.
Hope this helps. Hope this is not too vague. Everyone's journey will be different but the principles I think can be universal.