Don't overlook the basics. Don't ignore the foundation. How long can a tree remain standing without roots? - James Clear

Be forgiving with your past self.
Be strict with your present self.
Be flexible with your future self.

Stop thinking about your environment as filled with objects. Start thinking about it as filled with relationships. Think in terms of how you interact with the spaces around you. For one person, her couch is the place where she reads for an hour each night. For someone else, the couch is where he watches television and eats a bowl of ice cream after work. Different people can have different memories — and thus different habits — associated with the same place.

Maintain a margin of safety—even when it's going well.

Rich people go bankrupt chasing even more wealth.

Fit people get injured chasing personal records.

Productive people become ineffective taking on too many projects.

Don't let your ambition ruin your position.