One technique that I probably don't use as much as I should is block modeling. It's something I've used infrequently for years but since the lengthened development time and increased complexity rarely pay off for the scale of work I tend to do I usually just sketch through the tricky parts.
With some coaxing from a friend I decided to do it for the 4th design in the "vehicles that shouldn't have wheels" series I am currently riffing through.
Since Hueys have some pretty fun organic shapes to them - and since Sketchup's 3D warehouse has more than I need to 'kitbash' this thing together I decided to go for it. I wanted to go with the front cockpit of the 'Venom' model but kept the body from the original Huey because the top engine cowling is more streamlined.
Since my goal was only to model this up to ~50% I don't really have any drive to take this into keyshot and render passes or anything. I want to keep this process fast and loose which is always something i struggle with when building upon a 3D foundation. Hopefully I can do this more often and find a better balance.