Hi S.....
One of the things that I've found that works even now with my 7 year old is having a routine. That way they know what to expect and it's like they're ready for it. One of the things we include in the routine is reading a story before bed. It helps her to wind down. Now that she's old enough she reads to me, but when she was younger reading to her always helped calm her down. I let her have dessert at night, so she can choose between ice cream, fat free pudding, popsicles, fruit, whatever....depends on how much she's eaten that day, the timing, how well behaved she's been etc. Plus I don't want her to get into the habit of eating before bed every night, so if she hasn't been behaving, that's the first thing to go, including if she didn't go to bed well the night before. It works really well. Sometimes not reading a story also works, but I like to try to keep up with that because she really enjoys it and now has a great love of reading and is above average in her class.
Hope this helps!!
R.