Best ways to handle Cash Flows crunches ? (Startups, SMEs)

Hello,

I was wondering how other entrepreneurs manage Cash Flow Crushes : dealing with cash inflows vs. cost-related (Revenue vs. Payroll, rent, suppliers) :

• Do you rely on Credit ?
• Do you negotiate and supplier terms ? or adjust customer payment terms (schedules)?
• Or Capital injection from an investor (if you have one)? other ?
• Other

Thanks,