When I was eleven years old, it was a very good year, and I can remember my daily routine vividly. These were the years before I owned a Sony Playstation, and I used to venture to my friends house - everyday after school - to watch him play through Final...
Don't neglect plants! By evolving them and matching them, you get crystals. And you'll have to rely on these as crystals grow increasingly scarce.
Deal with bots quickly - once you get three or four on-screen, things get very difficult.