Manual outreach is the hardest, but most effective. You can do the easy stuff like social media, directories , quora, reddit and etc. Tbe best method is to do a backlink analysis of your competitors and try to obtain the same backlinks they have
I do look at competitors in ahrefs. The 3 above me in the maps pack have all crappy directory banklinks or broken backlinks and no on page structure. But yet they are ranking ahead of me and I have put in a ton of work on this site.