How can I improve cash flow forecasting and client payment terms for services?

[Paisley_M]

I run a small service-based business, and while we're profitable on paper, I constantly feel stressed about our month-to-month cash flow, especially with delayed client payments and irregular expense timing. I use basic accounting software, but I need a more proactive system for forecasting and ensuring we always have enough liquidity to cover payroll and taxes. For other small business owners, what specific tools, processes, or ratios do you rely on to monitor and improve your cash flow, and how do you effectively negotiate payment terms with clients without damaging relationships?