What do you think was the most useful tip? If you have played live, what would you add? My own personal advice would be: Don't be afraid to ask questions! Dealers and table mates are usually happy to help out a noob.
"Protect your cards" and "Avoid the booze" are very important tips.
Even if you have to use a small beer bottle as a protector - protect your cards !
And, well, you can play very good poker after you drank 2-3 beers, but if you drink 6 in a row, you are facing 2 problems: first, you can hardly sit at the table (due to WC needs) and second, your abilities to analyze and make good decisions become severely hampered, even if you feel yourself well.
My personal advises are two:
1. If you are a newbie, do not miss the chance to show others that you are a newbie. Ask questions, kindly ask for assistance by others at the table if you face a rule or something else you don't know.
This has two benefits: first, people are more likely to forgive you when you make "honest mistakes", and second, some sharks may think that since you are a noob, some stupid tricks and shenanigans may work on you - use this in your favor.
2. Try to transfer the good atmosphere and behavior in the CardsChat
freerolls in your live games.
Saying "nice hand" or "good game" is not just a formality of etiquette - it presents you as a polite player whom the other players will like and respect.