One thing to keep in mind... it's easier and cheaper to purchase life insurance when you are younger. The longer you wait to buy, the more expensive it becomes. Plus you add in the possibility of having something that will exclude you (if a medical exam is required).
You need enough to cover not just funeral expenses, but also to cover your bills, commitments, etc. I currently carry 3x my annual salary at work, plus an additional $250,000 policy. My employer also provides a basic $50,000 policy. I joke that I'm worth more to my wife dead than alive. (It's just a joke!)