the simplest things one can do to make oneself happier (*)...

There's nothing new I would be writing here. It's quite simple.

• Exercise daily. Meditate daily. Follow a good routine.
• Spend ample time with family and friends.
• Practice gratitude, it always reciprocates.
• Help others.
• Celebrate other people's success.
• Don't engage in over thinking.
• Think positive. Act positive.
• Let Go Of materialistic tendencies.
• Get closer to your work by heart.
• Be hopeful and optimistic about your future.
• Don't compare yourself with anyone. You are unique.
• Go outside and spend some time.
• Give freely.

Very simple but very important points.