It would probably depend on the circumstances and whether I planned it for awhile or if it was more spontaneous. If I wanted the wife to get insurance and I was going to plan it. I'd definitely make it look like an accident. Maybe crossover the center line at high speed head on into a large truck or an overpass support. Depressed but not necesarily wanting to make a statement of any kind, sleeping pill OD comes to mind. Distraught, emotional and feeling more spontaneous. Probably stick my 12 gauge in my mouth and push the trigger with my toe. Preferably outside. No point in making someone clean up the mess.
When I die, I want to go peacefully like my Grandfather did, in his sleep -- not screaming, like the passengers in his car. - Spydertrader