COLD CALLING.
When I worked as a Financial Advisor at Britam, my strategy was applied only 2 days a work week, for 3 solid hours during the morning hours. I would pick a building in Westlands and approach a company that I did not know. Ask for the contact of the HR manager and request to see her team for 30 minutes during their lunch break. When I was granted a meeting, I would give a white sheet of paper for everyone in attendance to write their phone number and email. Now remember that I said this was my action 2 days of the 5-day work week for only 3 hours during the morning hours, usually 9 am to 12 noon. On the remaining 3 days that I was NOT in the field, I spent it on the white sheet of paper *working remotely from home or cafes) My list had at the very least 15 names, and I would work on calls and emails. This technique is known as COLD CALLING because you are approaching a prospect who does NOT know you.
You target a COMPANY in your 5- to 10-minute radius drive; it was simply convenient. I found a way to gather contacts; doing this allowed me to build my own database. I did NOT necessarily purchase a list of names, and I used the phone and internet to follow up with my prospecting leads.