Err...my suggestion would be to follow more along the lines of Diana's study method instead of what I did because I missed a lot on my first pass through the three levels.
Like her, I also worked with other programs before (Rosetta Stone 1-5), so I progressed through Premium quite rapidly (like one lesson per day/7 lessons a week). The problem was, I tried to keep close to this pace through the other two levels (around 3-4 lessons per week) because I already had plans to go to Brussels and Paris that year, so I gave myself an aggressive deadline to finish. I was studying roughly an hour each day, and I finished the three courses in ten months.
Suffice it to say, I missed a lot of detail, and although I was able to get by as a tourist, I knew I wanted more competency. So now, I am working with tutors, reviewing grammar using a French grammar exercise book, and refering to the applicable RL lesson when needed.