Full blown tutorials ? Probably not, I do not have lots of time lately (instead going on 4 days of work per week I had to go on 6 for a few months)
Body of this vehicle was created out of 32 sided cylinder (top half) and some careful edge extrusion. Here is few tips (general ones):
I use mostly few commands in Silo, like polygon (with "keep together" option ON and OFF as needed) and edge extrude, inset and normal scale, shell, flatten and mirror.
I try to break model in as many parts as needed. I almost never model everything out of one single primitive, to me this is a key factor for fast modeling. I delete all polygons which are not gonna be visible in the rendering process as well (using "shell" command creates a lots of these).
If I subdivide the mesh (for more definition) I try to delete all the loops which do not contribute to the overall shape if possible.
