Becoming disciplined/consistent about following through on commitments we make to ourselves and others doesn’t mean we ever get over the temptation to make an excuse. There is almost always an extenuating circumstance.
It just means we consistently prioritize a) saying no to commitments that don’t matter and b) finding ways to show up – especially on days when we don’t feel like it.
It is fascinating how similar this is to courage. We don’t ever get to the point where fear doesn’t exist (if we manage to keep our sanity at least). We just learn to not let it get in the way of taking action.