Mig has several vidoes out, personally his Stockholm video (2 parts) is my favorite. They are long but he covers pretty much everything. The only down side is he makes it look so easy.. Mig does weathering
I tend to use more of Migs methods than any other butI do use the pin wash method from Michael Rinaldi. I find his method of less wash makes it easier to clean up and keep neat. I feel that Micheal's methods are a touch more technical than Mig's. That can just be me, and I am by no means an expert or really even a hack at this.
Best advice I can give is just give it a go. I struggled for years with simple washes. Then I watched Mig slop a wash on a tank and come back in 5 mins and fix it. He made it look so easy so I gave it a shot and it worked out. I still at times struggle with trying stuff but remeber they made thousands of the kit you are working on and you can get another.. oh yeah and I might add well placed tarps and mud cover up 90% of your mistakes.
PS: Mig if you still lurk here and read this.. thanks.