2nd Tournament

My second chance to redeem myself in tournament play will present itself on January 29th.  I have mostly played on chess.com since my last attempt.  I have spent a lot of time on the tactics trainer since then.  

Thinking I would have no problem whatoever dispatching my chess slacker kinergardner and 2nd grader after all of my hard work proved incorrect.     I took notation during both games, which I think I will do again every day till next Saturday.  The kindergardner kept arguing with me that I should put an exclamation mark on his moves since they were obviously so very good, after checkmating me, he pointed at move 13 on my pad and said "I told you so!".  The 2nd grader faired worse, but he'll get his rematch soon ...

What is the best way to prepare for the live tournament?  Study more on the computer or play live games?  Read more books?  Playing my kids today has made me consider that all the 1-on-1 with a book or a computer may not translate as well as I hoped to sitting at a table against a live opponent.