1. Do I need to add any redirect rules in the .htaccess file on the old site/domain?
ALL redirects will go on the old site. Once the request arrives at the new site, there should be no further redirects. The new site's htaccess will only be for people who requested the new domain in the first place.
2. What is the complete redirect code that I would need to place in the .htaccess file on the new site?
Oh, come on. You've been here since 2007. You know better.
:: shuffling papers ::
Why We Make You Do It Yourself
There are plenty of forums where you can post a "how-to" question and get a fairly immediate answer. The answer may even be correct. But WebmasterWorld is about teaching you how to do it yourself. That way you can roll your own htaccess-- not just for today's problem but for tomorrow's almost identical one.
Here is the analogy:
Your child's room needs cleaning. You know that you can clean it yourself much faster and better than if you have to stand over your child and force him to do it right. But if you do the "make him get it right" part often enough, you will have raised a child who knows how to clean his room-- and who will some day stand glowering over his own children in the same circumstances.
Some day, someone else will post a question in the WebmasterWorld forums and you'll say "Hey, I know the answer to that one!"
Besides, when someone with a low post count asks a question, that person may have posted the identical question in six different forums. They grab the first answer they get, and never even come back to the others. You can understand that this is infuriating for the person who took the time to compose an answer.
Thanks Lucy. I know, I know. Shame on me for asking. :)
Shocking as it is, it's my first time dealing with this situation of a new domain replacing an old one and setting up the 301 redirects. I'll find the correct rewrite code, but one last question ... how long do I leave the old domain running with the 301 redirects before I shut it down completely?