Are you wanting to go as far as makeup? or just work with what you have at the moment?
If you are working with what you have, some good suggestions have already been made (eyebrows). Personally i'd grow my hair our longer (if i had hair

) and work with my clothes and jewelry. You don't have to wear a dress; there are lots of choices of femme clothes that could be taken either as male or female clothing by the average person. Assuming that you'll want to start out slow - you'll just have a shirt with buttons on the "wrong" side, or jeans without usable pockets in the front, or shoes that aren't a usual color for guys.
If you are willing to try some make up you can go for a mild approach (think david bowie or steven tyler) and apply some eyeliner.
Just think thru each change and make sure it will fly with your daily routine (your job, your s/o, etc) before you adopt it, especially changes that take awhile to grow back.