Ultrasound

I'm in need of some advice so this is my second preganetcy and I am currently 24 weeks along and I finally got my ultrasound appointment booked! So my last pregnancy my ultrasound photos didn't come out very well i could barely see the baby and the doctor told me I needed to drink more fluid i want my ultrasound photos to come out good and hopefully this baby isn't as shy as my other one was do yall have any advice or tips for me to try so my ultrasound photos come 0ut good? I have almost a whole week to prepare.