ANY goal is worthwhile if it means you have motivation behind it! =]
First of all, CONGRATS on the 8 lbs! I know it seems like it took a while, but think about if you hadn't worked hard. You would still be carrying around those 8 lbs! Keep up the great work and you will make it to your ultimate goal for sure.
I always feel that little steps add up to the major result. If I think about needing to lose 100lbs it's overwhelming. I would MUCH rather be motivated to lose 5 lbs 20 times, than that whole big picture of 100lbs.
Great job!! Stick with it <3