From Realtor.com; Because, let’s face it, moving’s stressful. And expensive. And did we mention stressful? It’s no wonder most people eventually decide to ditch the DIY approach and hire professionals. But that doesn’t mean the stress goes away. There are plenty of things that could go wrong.

To make the day go as smoothly as possible, you need to know how your movers work best—which includes when you should be there, when you can pitch in, and when you need to get the heck out of the way.

We quizzed some movers on their biggest pet peeves when it comes time for moving day. Here are seven things you need to know.