That's the ultimate question isn't it? The thing that we on the left have been struggling with forever. For the employed, especially in low paid, high explotation work, talking to your coworkers about unionizing is the best pathway imo. It also serves the purpose of helping to build dual power. For the unemployed and truly destitute, establishing mutual aid programs and reaching out to people that way, letting them know that things could be better and different while helping them to survive could be a viable method of radicalization.