Yes:
* During the strike, show solidarity by not crossing picket lines. Don't use the service, and don't patron the business for the duration of the strike. This is because during the strike, the workers that are filling in for the strikers are scabs and crossing the picket line.
* Spread the news, their demands, and encourage solidarity with these workers.
Strength is in numbers and solidarity. When that breaks down, the movement breaks down. It's why many States and companies do everything in their power to prevent the wage-earners from organizing effectively.