I don't make my own PCBs, but something I've not seen mentionned in the laser toner transfer technique is that the paper backing for adhesive labels is perfectly calandered (ie smooth) and will gladly release the toner with just a bit of heat. The bonus is that this type of paper is free. Just look out for the lines where the die-cutting blades cut. Basically you just print on the smooth side and there you go.
I've used Corporate Express EXP00716 labels and made a test etching for a mixer board. I think it went fairly well, but I never soldered to it. (I just plop the parts right on the mixer, it works)
I believe the idea is that this paper won't grab to the toner preferentially to the rougher copper surface.
Anyways I just thought I'd toss that out there. Do with it what you will.