NICE IDEA!! I was thinking of making a thread like this right when I found it.
I really need some brushes. I use more blur techniques and filters more than straight-up brushing for my bg. Renders give me ideas, not the other way around too.
hm..... I usually like a gradient overlay. I will also incorporate a less opaque layer as well. I tend to like text too...
That's all I can think of so far.