I recommend personal productivity books, especially Getting Things Done by David Allen. Everyone in the department needs to read and follow the principles, which can be very hard to sell when you are not the boss yourself. The worst thing is being in meetings where people agree to pieces of work, then a week later at the next meeting, nobody has done anything, they all have excuses but the real reason is they didn't write it down, didn't take responsibility to understand what the whole team and project needs from them, and they don't get any pressure from management to do a better job than that. I eventually gave up trying to "fix other people," and instead just implemented my own system so at least I could be 100% responsible for doing my own tasks and project pieces that I agree to do. You can set a good example - but it's rare that anyone will follow your example without pressure from above. You'll even get kudos from the people who can't do it; then after that - they make no progress themselves personally. The gears don't engage. Honestly it's very frustrating. Every job I've had over the past 35 years except one were dysfunctional organizationally, and nothing I did as an individual contributor had much impact.