Tips for a 3D ultrasound?

Are there any tips/tracks to a good 3D ultrasound session? I just booked mine and I’ll be 29 weeks and a few days when we go.

Had my 3d at 28 weeks and this is what he looked like he wasn’t having it lol

When I went for mine, my son was asleep and refused to pose for the ultrasound. They had me drink a chocolate shake to try and get him active lol it worked