other than reading the works of authors you like and drawing inspiration from - though not necessarily copying - their style, i find that for me, its often very helpful to reread over my own writing as i go to proofread for grammar errors and the like, but also to check the way it all flows. reading it aloud can be especially helpful in this sense! the way the writing feels and sounds is tremendously important, in my opinion, and the more attention that gets paid to it, the easier it gets to find that flow without paying so much attention, if that makes sense.