When I model I make sure I have good Image plane, then I start with a simple nurbs cylinder (height and spans = 4x4) then I make sure the histrory is deleted.

Then I position the hulls on strategic places and then adjust the vertex. When ths is done you will have a global outline on the model. And now we add Isoparm. Do not add 5 sections in the same area, but look for isoparms that have big gaps between them and add them first. Always adjust the vertex afterward.

If you do this slowly your model will appear with the proper detail.