I really have not changed any other settings besides what Juice Defender is doing. I do have the brightness on my display set all the way down and just toggle it up when I am outside. I do have the paid version of Juice Defender that has a lot of options to set. For example I can set schedules so that during the week it pings every 15min for email, updates, ect. but on weekends I can set it to 30 mins. It also completely disables the cellular data radios when I am on Wi-Fi. I am on 4G and have a pretty strong signal in the places I spend most of my time.
I might look into the paid version...I usually just toggle off my data radios manually when I turn on wifi. I keep auto brightness on most of the time, or just toggle it down. I have poor signal at school, and when it turns off my radios while I have the screen locked is invaluable. I think one thing I forgot to turn off the past couple days is auto sync. Where can I set though how often it syncs? I can probably keep that on as long is doesn't sync too often.