Once you have the beliefs that will lead to your success ingrained within you, you then need to have a strategy to achieve the results.
Set your beliefs that you're in great shape and physically fit; you know what you can accomplish (such as running a marathon); and you can see yourself doing this, you can hear the applause (or whatever sound) and you have the feelings.
Allow your inner being to do its part in fulfilling your goal, letting change occur. After these changes have taken place and been performed repetitively, a new pattern will develop that will create the habitual change within you.
It’s OK to be grateful to yourself, this is a wonderful affirmation. Hearing the words "thank you" relaxes the muscles and deepens the resolve. If someone, anyone, thank you for something, it naturally makes you feel good. You want to keep doing it to get that praise again, so praise yourself. Soon others will see the positive changes in your life and praise you, too.
Amazing @chbartist ...!!!