What’s the best way to raise money?

Sam Altman (President at Y Combinator)
Fundraising Advice for YC Companies – Y Combinator Posthaven

You should care more about good investors than good valuations. Talk to the founders of the companies that investor has funded (especially in cases when the companies haven’t worked out). You should insist on clean terms (in practice, offering messy terms is a sign of being a bad investor).