Please forgive me for looking for a last minute quick and easy answer, but I'm leaving the P&S cameras in the drawer again and will be using my D80, and I don't want to F up another Christmas with crappy pics. No time to delete, re adjust and shoot again. So, I pre-set up my camera on the tripod to take some pictures tomorrow morning. I'll be using my wireless remote so I can be in them as well. (1st time for that) I'm using my Sigma 18-200 3.5 lens. I'll set my ISO @ 400. Then my WB to auto. Aperture to 3.5 max for that lousy lense. Off camera flash (cheapo unit. On/off type). Shutter speed......I have no idea. ????? I want to pick up the lights on the tree but if I go too slow the kids moving around will blur the shots. Also, I will not have the greatest light due to the weather and only two lamps in the room. So.....kids running down the stairs, then kids taring up wrapping paper in low light. What should I do. PS* If I guessed correctly, there's a 24-70 2.8 under the tree for me. PSS* I also set up a video cam as a back up because three years in a row, I screw this up.