Ask HN: Advice on stock incentives

I've been awarded options to buy stock but the accompanying legal documents make my head spin. Are there any common caveats or other things to look for in an employee options contract?

Would you advise seeking professional counsel to review them? If so, would this be in the realm of a CPA or a lawyer, and what would the process look like for them? Is this something people generally negotiate on, or is it more along the lines of take-what-is-offered?