“If you think what you did yesterday was great, you’ve not done anything today.”
In other words: Don’t rest on your laurels for you still have work to do.
So, one achievement will lead to another which will lead to another. When will this stop? When can you sit back and enjoy the fruit of your success? Only you can be the judge of that. If achievements provide fulfillment to your life, contributions will provide you meaning. Early achievements will provide the foundation for more achievements and those will provide the foundation for contribution. One day will come when your focus will switch from achievements to contributions.