I always start with the central portion of the skeleton. In most characters this will correspond with the pelvis or center of gravity. For our low poly dino I chose the area in between his thighs. Drag out a chain of bones as I have shown above. Right Click to end the chain.
Lets drag out another chain of bones.
Click on the first bone and drag out the chain to the head as shown below. Notice the placement of the bones. Particularly the last and next to last in the chain. We will use this set up to adjust the gross movements of its head. The finer control we will get into later when we explore Morpher.