Drafting patterns: changing darts to princess seams

Although I have now got a blouse pattern with princess seams to use as a base, I thought it would be useful to find out how to draft one anyway. Especially since I said I would finally start trying to draft my own stuff... (I will do this... I know I always put it off every time!)

So I found this really good tutorial on Burdastyle:
Changing darts to princess seams

It actually makes it look really easy and now I feel kind silly for complaining about my pattern. mope.

Update on blouse pattern 6732

Remember when I was talking about that blouse pattern New Look 6732? Well I started cutting out some of the pieces this week for blouse E, the one with the short sleeves.
I found that it turned out to be really long and that I would probably need to cut a good 5 or 6 inches off the bottom. I also found that there are two sets of darts to form the shape of the blouse. Including a set which has points at each end. (There are some tips for these here.) I really prefer princess seams, they are meant to be harder to sew - but I have way more trouble getting darts to lie correctly.
So I've decided that I am finally going to start work on drafting my own patterns.