Your mileage may vary, but here are some of the things that I do:
I try to change clothing when I get home... At the suggestion of my fiancee, I've moved my "male" clothes into the hall closet and just pull a pair of slacks and a shirt and tie the night before work. That way when I come home I can just walk into my closet and see nothing but my female wardrobe... odd, but it helps.
I also carry a purse to work- I leave it in the car, but loading the purse at night with keys, wallet, etc, makes certain they are all in one place for me, and helps me feel better going out the door with my purse... and I wear it from the car to the house. Makes me feel like I'm making progress on keeping track of the contents of the purse, etc.
I also go out at least a couple nights a week, even if it's only to the store, dressed properly, working on passing as much as possible.
I do my voice on the way back and forth from work in the car, too. At the moment, I'm waiting on my contract to end with the current company (and for me to secure a new job, hopefully work-from-home, but at least trans-friendly). Fortunately I write software, so there is a reasonable hope I can find a job meeting those requirements.
And then, of course, there's my all-me facebook page, pinterest, and, well, Susan's... I've noticed lately that my internal voice shifts to female most times while I'm on the internet; it's the only place where I am *totally* out as a woman.
*hug* Please feel free to PM if you have any questions!