1. No agenda and schedule time because "we need to talk"
2. Forget to invite decision makers
3. Schedule meetings to prepare for another "big" meeting
4. Show up late
5. Don't take a good note during the meetings and don't discuss about next steps to follow up
6. Schedule a short meeting for a big group discussion.
7. Talk about lots of unimportant things to avoid talking about what is really important or simply fail to define what is important
8. Forget to provide context or send things that can be read before coming to meetings
9. Forget to keep time
10. Forget to cancel recurring 1:1 and show up to "say hello"
Check out other posts I wrote about career here.