When heading up an important project, you have to have in volatile standards regarding what you will and will not accept from your team.
As this Project Management Hut article rightly notes, letting things like internal bickering, shambling meetings, team member burnout and slipping deadlines and work quality will effectively doom any projects before it gets off the ground. Giving a firm hand on the tiller is the only way to keep from crashing into the rocks.
Read the full article here: http://www.pmhut.com/10-things-successful-project-managers-never-tolerate