Isolating Variables
Only test one thing at a time. Trying a different technlogy? Apply in a domain you are familiar with. Approaching a new domain? Use a technology that you are confortable with.
Use your product
Use your own product regularly. You'll discover pain points, usability issues, and opportunities for improvement that you might otherwise miss.
Work on what you believe
Focus your energy on projects and ideas you truly believe in. When you work on what matters to you, motivation and impact follow.