Do something every day you hate to do. Do something that is painful, uncomfortable and tests you physically or mentally. That makes you strong physically and mentally. If you keep doing things that you are strong, then you keep doing it without accounting for deviations or variations that challenge your strengths.
If you like running there is nothing great at just running, if you like cycling nothing great about just cycling, if you are writing nothing great about just keep on writing. Be great at it, challenge your strengths and be great at them. What is your contribution in that field, how did you make a story for yourself in that area, how you are special in pursuing your passion.
Lead by example, you cannot give excuses when you determine to do something in your life. Stick to the routine, do it no matter what happens and no excuses. Integrity is important and never say something that you did not do or followed.
Having high integrity is important. We know many doctors who smoke or drink or even unhealthy lifestyle, we know actors who does great characters in movies but not worthy in real lives, we definitely know people around us who talk something and do something, would not be on time, may not show up when it is required and so on. People respect when we have integrity , when we walk the talk and talk the walk.
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References:
Some excerpts from motivational talks and videos