I used to set goals in the beginning, usually as part of challenges on 3FC. But, as my weight loss slowed down, I couldn't make my targets anymore, so now I set ones without dates. My main bugbear is trying to get under 199, it's just not happening, hence no weights appear on my ticker at the moment. Once I have slayed that particular beast, I'll start displaying my weight again.
Just do whatever works for you, what you do now, probably won't be what you do in six months time!!!
Best of luck setting and meetingyour goal, you go girl!!!