Exciting about ordering the doppler! I hope they work out for you too! As far as tips, have a full bladder, put the doppler wand really low, like right above your hairline and tilt it around instead of dragging the wand. Take your time and move it very slowly so you don't miss it. I've found it's kind of hit and miss if you find it between 8-10 weeks, but after that, it's pretty easy to find it every time.