I know, but the question is "How?" Particularly because if you just do it naively - like calling the same prospect over and over again and begging them to buy - you tend not to get very good results. Relentlessly resourceful, not just relentless.
I'm faced with similar issues, but I find that by reaching out to the people and other resources around me, things arise that I would have never otherwise considered.
When you face a dead end, that's exactly when you need to tap into the relentless (never giving up) resourcefulness (looking in places you have not yet considered).
Sounds great in theory, but it's much harder in practice.
It's like starring up a 70 foot wall and wondering how to get over it.