It boils down to local directories and setting up your GMB page.
One key tip on local directories: Make sure your NAP information is consistent.
A lot of SEOs who use tools to auto-post their client's information on local directories don't double-check their submissions.
This can be a fatal error as far as your client's local rankings go.
Because if there's any inconsistency in your listings, it can work against you.
If you're in a fairly competitive space and your competitors are more consistent than you, they probably will outrank you.
A little bit of attention to detail, when it comes to local SEO, can definitely go a long way.