Hey - congrats on the finish, well done!
As far as the other stuff goes, and I'm probably stating the obvious here, I think you should do what you're comfortable with. If you're cool with playing one table and just focusing on that, then do it. I would guess that like most of us, eventually you'll find that your mind begins to wander and you'll realize that you don't need to focus 100% on one table, so you'll add another. Personally, I'm not too comfortable with more than 6, but there's a ton of guys who could probably 6-table and carry on a conversation with several people at the same time. Unless you're really concerned about maximizing your hourly rate, I wouldn't worry about how many tables you play.
Glad you stopped looking at mucked cards, too. Like TPC said, keep an eye on the action on the table, eventually you'll figure out who you can make moves on regardless of what your cards are.
Keep at it, and I'll see you at the CC freerolls