Former founder here. I wish I had had this when I was raising my series A. I lost control of the board at my series A when the VC said that a 2-2-1 structure would be better for everyone. 13 months later, I was fired from the company I had started. The risks are real.
Had I known what a standard, clean series A term sheet looked like, I could have just pointed to this term sheet on ycombinator.com and said - "Make it like that."
I've found the Y Combinator resources to be some of the most valuable resources out there for startup founders. Do yourself a favor and familiarize yourself with what is available. It could help you not get fired from your startup.