“You did not choose Me but I chose you, and appointed you that you would go and bear fruit, and that your fruit would remain, so that whatever you ask of the Father in My name He may give to you.” (John 15:16, New American Standard Bible)
The very fact that we exist is proof that we’re already chosen – it’s not earned, but bestowed upon us. One cannot “earn” spiritual sonship or daughter-ship – it’s bestowed upon us by the fact that we’re already the children of God.
So every day – and more accurately, in moments all through the day, we can keep reminding ourselves that we are already chosen by God to be about our Father’s business. Focusing our thoughts on God helps keep our thoughts off ourselves. This helps us to get the “me” out of the way, and lets something of our true spiritual selfhood come through.