Here is what I do, might not be the best way but it works for me, and might help you.
All I use is a pad of 1/4" graph paper, tracing paper, a flexible curve, a ruler, and engineering pens (not needed but nice for tracing and getting the edges straight when tracing around the curve or ruler)
1. I draw out the design, make notes, and kind of get an idea of what I want, bevels, handle, pins, etc, on the graph paper:
2. Once I am done with the drawing and happy I trace it out on tracing paper(just the outside design):
3. Once the trace is done I cut it out and glue it to cardboard and cut the cardboard to get a feel of the design, I use this spray glue from 3M:
Once I am happy with the feel I dykem the steel and use a scribe pen to transfer it to the steel (sorry I do not have pictures of these, the steel and everything is at my shop). This way I have the initial drawing, and a cut out for future use if I plan to make the knife again or I mess up. Hope this helps, I know it is not the only way to do it, and maybe not even the best but it works for me and may give you some ideas