I've also been reading some of the writing books i have on my shelf, Manuscript Makeover by Elizabeth Lyon and The Art of Romance Writing by Valeria Parv.
My goodness, just reading these and then reading through someone else's work is helping to sharpen my own writing! I have picked up things my friend is doing, thereby helping her by drawing her attention to it so she doesn't do it again (I hope!) and noticing that i do it myself!!
I highly recommend getting yourselves some craft books and even helping a friend by editing or even reading someone else's work in the editing stage. It really does help your own writing!!