I'm sure there are times when we all want to give up, because the dieting and training is alot of hard work. But nothing is ever handed to you in life, you have to work hard to accomplish your goals no matter what they are. When it comes to training it's difficult for us to notice changes in our bodies, since we see them everyday.
Just as self-motivation you might want to try to take pics of yourself every month so you can visable see some changes, I know this works for me.
I also would like to add that the women on this board are very motivating, and supportive to each other, and that's great to see.