I actually use a system where I outline my goals for the month and then break those goals into smaller milestones for each week. Then on Sunday when I plan my week, I make sure that I will be working on some of the milestones each day or at least throughout the week. This practice has definitely helped me be more productive and effective in my work and I think it will really benefit a lot in the long run. Also, do let me know your views on day planning