Even my dog has just one master

Help! I have so many people “tugging on my leash,” my neck hurts. I work at a company with five divisions, and each time we start planning to attend another tradeshow, the demands come flying at me from all corners.

Upper management wants to promote our company branding initiative. Product managers from each division scream for me to push their latest and greatest. Sales and marketing want our new ad campaign to take the fore. And they all disagree over how many people they should be able to send to the show to work in the exhibit.

Should I step back, and let them fight amongst themselves? Call a meeting? Come up with what I think is a fair solution, and ask them to sign off on it? Or what? The problem lies within the fact that I am responsible for making the show happen but hold no authority over many of the people I need to get in line. How do other people manage to get things done when they have to please so many “masters?”