Not really. I have notes somewhere where we did a workshop on crime. How to get dispose of a body etc. Funny that an ex cop was there giving us great clues and I took some notes, hehe.
There's all sorts of ways besides you leave clues via bank card statement etc. Use cash so doesn't leave a trace but remember there's cameras everywhere now. So maybe look to fluro hoodie that makes the id cameras go funny. Might want to look into what allergies people have. If they're accident prone. What medications are they on? Study their habits, etc.