1. eliminate "of," OR add "the" after "of" 2. also needs a comma after "inneffective" 3. tick 4. tick 5. tick 6. "most people" is okay. "of the" is not necessary, but I'd say either version is correct 7. "improving" is better, but "to improve" is not exactly an error. But I see your point. "Improving" would be preferred. 8. tick 9. tick 10. tick