I used my Wacom Bamboo Create tablet and the software I use is Sketchbook Pro. I have been practicing clothes and basic body structure, and I must say I'm pretty happy with the great references I've been able to find in the deviantart community.
I used 's base as a reference which you can find here: clothes base
Oh and I tried to draw one of 's outfits myself, the one on the far left. Yes this design is completely hers, not mine. I was just practicing some strokes and it was easiest to try and imitate her's: left figure