Biggest thing is to have a sense of purpose, a goal, no matter how distant. If you have that, the second biggest thing is to be productive and not waste too much time, which is tough because our society fucking runs on exploiting and monetizing time-wasting right now.
One of the saddest, hardest to deal with facts in life is that most people who are miserable and/or losers in life are those that fail to maintain that balance in a positive manner (and that’s before even getting into any actual problems that people might have that make things even more difficult). This manifests and metastasizes into any number of addictions varying in degrees of seriousness and social acceptability.
People waste too much time watching TV and playing video games, get too wrapped up in politics, eat too much unhealthy food, watch too much porn, abuse any number of substances, the list goes on… The most extreme of which we get to observe on this very site.
We’re all only human and nobody’s perfect, but try your best. Work towards something big, be healthy, go outside, enjoy life, and don’t let the angry retards ensnared in this grand self-created trap bother you too much. If you do all that and keep moving forward I guarantee it’ll (eventually) all start to make sense.