I love this post by Morgan Housel.
Truth in simplicity.
A few of the only useful hacks I know:
Marketing hack: Make a good product that people need.
PR hack: Do something newsworthy.
Writing hack: Write every day for years.
Learning hack: Read a book. When finished, read another.
Work culture hack: Trust people and pay them well.
Investing hack: Give compounding the decades it requires.
Networking hack: Email people you admire and ask them out to coffee.
Savings hack: Lower your ego and live below your means.
Career hack: Work harder than is expected of you and be nice to people.
Relationship hack: Deserve to be loved.
Organization hack: Clean up your mess.
Diet hack: Burn more calories than you consume.
Fitness hack: Sweat and lift heavy stuff.
Fundraising hack: Make a product lots of people will pay for with decent or better margins.
Scale-to-a-million-users hack: Make a product a million people need.
Product hack: Solve a legitimate problem.
Making college more affordable hack: Go to an in-state public school and work full time.
Productivity hack: Realize the consequences of being unproductive.