Take care of health, both physical & mental. Get regular checkups done.

Chase peace, not happiness or proxies of it.

Learn. Create. Lead. And be a lion, not wolf.

Put extra caution on safety. Traffic, etc. Even with low probability of it not happenning, it's not worth it.

Create rituals. They put you in zone. Both for your work, family and friends.

Risk/Reward ratio. Simple formula: How big it can be * probability of it happenning.

Know what makes you happy and be like kid. Never let anyone talk you out of it.

Try to not compare yourself to others. World is freaking good at status games.

Keep your ego in check or it'll hit back hard when you need it.