Now that I am working with inks, I like to see what it will look like before I do it.  also because I have so many different sketch pads, pens can look different depending on the paper.  So before I put ink to paper I always take a piece of paper out of that pad and scribble to see what my textas and inks look like on that paper, if they bleed, shadow or not etc..

here is a sample from my This Is War scribble page