I can't really think of one particular memory.. I do remember the feeling of waking up every xmas morning and being almost scared to open your eyes incase it wasn't morning and Santa would know I was awake and maybe disappear..
My sister and I always had a tradition that we had to share the same room on xmas eve.. This continued until we were well into our 20s. Always made it more exciting. I can always remember lying in the dark, almost sick with excitement whispering to each other, "are you asleep yet" then answering "no". This used to go on for hours!