Another important one is consistently informing managers, mentors etc in a timely manner if e.g. you get stuck (mentor) before it's too long, or if you're not confident you can deliver at the time previously communicated (manager).
If you don't do that, time is wasted and deadlines are missed. If you "usually" do it (like 75% of the time), that's not enough for your manager to trust that she doesn't need to ask for your status every day, just to be sure..