Here's what I have been doing until now :
-Wear not-so-loose pants ; not necessarily tight ones, because those will not make you look female ; it will make you look uber-gay, and unless I am mistaken, you do not want to be hit on by guys just yet. (<- I've had a couple experiences D:)
-Use female clothes for your feet, head, neck and hands : gloves, mittens, socks, shoes, slippers hats, beanies, scarves. Unless you go for the white, light blue or pink or with a fluffy texture, those should be pretty androgynous.
-Carry around a bag with stuff in it on your shoulder. Androgynous as long as you don't use an actual purse, practical (I cannot go out without it now) and kind of helps feeling feminine.
-You can use some girly stuff once in a while, like, uh, I don't know, a purple pen.
-I guess at some point you could start using girls' panties, but those will require you to tuck all the time (because an erection with that on is just... no), which also requires that you shave or epilate your pubic hair all the time. If you're as slow as I am, this would mean about 1.5-2 hours a day that is gone just for that. I myself will wait for SRS to wear those.
-When buying a sweater, go for the androgynous ones. These are generally the darker-coloured ones. It may sound strange, but colourful men's clothes are pretty different from colourful women's clothes.