Like I stated earlier I use Super Sculpey to quickly mass out a sculpt and Premo to finish it off. Starting here I am using Premo over hardened Super Sculpey. Premo takes a little longer to work with, but trust me it will be worth it once you get to texturing your sculpt and using solvents. Here is where I start to hone in on all the detail and use my sculpting tools quite a bit. If you ever find that in the previous step when you were massing out your sculpt that you built an area out too far you can simply sand that area down or shave it down with an exacto knife (watch those fingers). Premo is also much less prone to cracking than Super Sculpey and if you follow my advice on the last page and harden it with a heat gun, you should be golden.
In the previous step I was loosely laying out this little troll's musculature but in this second layer you can see that I'm building out his muscles and fat belly much more carefully, paying particular attention to the stretching and compression of the muscles and flesh. I used ball bearings for his eyes so I wouldn't have to worry about accidentally warping them. You can see (on the left) that his body is slightly crunching to the right as he is beginning to shift his weight to his front foot. At all stages of your sculpture remember to stay true to your creatures balance and the effect on the muscles and body for maintaining that balance. This creature is not being magically held up by ropes, he is under his own weight. Many times just thinking about what your creature is doing will inform you as to where the clay needs to be added or removed.
If you are sculpting your sculpture in separate pieces (like I am here) a great way to keep those pieces separate while making the seam match up perfectly is to separate the pieces by a layer of saran wrap. As I was sculpting the shoulder and upper arms of this little guy I did just this to keep the pieces from sticking together. The reason for sculpting a sculpture in separate pieces is when you go to mold your sculpture you want to be able to create neat two piece molds. When you look at this sculpture you can see that the legs are going one direction while the arms are going the other. If I were to mold this sculpture as one piece I wouldn't be able to get the arms out of the mold without cutting them out (This will be made very clear in the molding tutorial). Another option is to sculpt your sculpture in one piece and cut it into separate pieces after it's finished, but this way is never as neat in my opinion. This is why I like to plan ahead for molding from the very beginning.