Learn a new skill. Teach yourself how to juggle, or start learning a foreign language, of learn to draw/paint, learn to code, do something constructive other than complain about your free time on the internet, volunteer somewhere, etc.
Message a random number with:
[quote]Hey man, it's me again, I know you told me to delete your number but where did you want me to hide the body? My memory is always failing me lol XD[/quote]
If they don't respond within a day say:
[quote]The body kinda stinks now, I'm getting guests over tomorrow, hurry up and reply, it'll be hard to explain why I have a dead war veteran lol XD[/quote]
Get creative if they reply.