The mustachian answer is to max out all tax advantaged accounts, the entrepreneurial answer is to not give a damn what anyone says and go all out on the business, including maxing out credit cards and mortgaging your house. Which answer is right no one can say and depends entirely on how good an entrepreneur you are. If you choose the former you will probably be successful, but it could take awhile depending on how much you save. If you choose the latter might not be successful, but success could come much faster if you are (of course, failure could also come very fast).