If you are telling yourself every day that you don't have enough money, sleep, wisdom, energy, confidence, experience to do the things that you want and need to do, then you will come to believe it. This will make you afraid and will stop you from doing all the things you would like to do.
If you cannot appreciate all that you have achieved, how far you've come, the money you have earned, who you are, for thinking about the miles you have yet to go to reach your goals, then you will forever feel inadequate and limited. Don't postpone your gladness until you have more, weigh less or achieve something new; you know that to defer your happiness in this way is never to reach it.
And somehow we all bought into the idea that if you have enough money, anything is possible, when we know that money without love is meaningless and wealth without personal courage is worthless. Do what you can with what you have available to you and don't let lack of funds be your excuse.
Practice is as simple as taking five minutes every night to be grateful for how much you've done that day, for the friendship of others, for the small things that made your day better, whether it was lunch with a friend, a tick on your to do list, or a walk in the sunshine. It switches your brain chemistry around, so that instead of feeling the pressure of not enough, you get to climb into bed with a smile on your face and the feeling of contentment. There might be more to do tomorrow, but today was good.
Gratitude grows then, and a positive outlook; not one in which we berate ourselves for all of the ways we lack and are lacking, but one in which we hold space for all that we have, all that we are, and all that we are becoming.