If this is about showing up early to an event or party, not really. The host or organizer might not necessarily want your help and would rather not have people showing up early getting in the way of their plan or system. They might also have everything ready and want some quiet before people show up. They may have the place ready for the event, but now need to get themselves ready (shower, make-up, etc). Never know.

Show up early if you know the host well enough to know if they would want help or simply ask them if it's okay for you to show up early to help out.