I'm spending 6-7 hours on lectures too- but I love the quizzes and I have found that for me it is best to try to be at the library (only place I don't get distracted or take naps) and have lectures started by 8:30-this coming from someone who didn't get up before 10am except on clinic days or test days for the past 2 years. If I start at 8:30 it's early afternoon when I finish and then I don't feel as stressed since I know I have several hours to get stuff done and can still have time to watch a tv show or grab dinner with a friend in the evenings.