re: Signed up to coach my kids U8 soccer. Any advice is appreciated.

Good luck. Most kids at that level are still grasping the basics and fundamentals. You'll have a couple that are naturals but a lot of them don't get it yet and some won't ever get it. Had the most success by tricking the kids into doing drills without them even realizing it. There's a ton of info online about basic drills for youth soccer fundamentals and how you can make those into little mini games that will keep the kids focused and interested. Keep them occupied but keep it fun and build up their fundamentals. You can run them to death and be coach ditka later.

They'll try and bunch up. Got to work on spacing and keeping position on the field. It takes a lot of time but it's worth it.

Don't forget to practice set plays corner kicks, goal kicks, penalty kicks (most U8 leauges all pks except shootouts are indirect kicks). Too many teams forget to practice these they screw them up horribly and then they get destroyed on quick turnarounds.