There are so many ways that I don't if I can list all of them but, I will strain my brain and give you all the suggestions I can think of:
posting an ad in the classifieds,
listing an opening with the employment office in your area,
posting at a library,
posting in different forums,
posting on a site that is related to the business you wish to get started,
put flyers in stores if allowed,
post at the park or recreation center in your area,
where you know people visit and walk around post a wanted help ad,
talk with other volunteer businesses in your area,
people in your own town,
eating places if allowed to post ads inside,
community buildings may allow postings
anywhere you know there is a bullentin board usually allows you to place a help wanted sign and they welcome it.
I hope this helps.
Good Luck with your adventure in business.