Some best picks of top ten data destruction methods listed by Ibas.
If dropping laptop from table to floor isn't enough drop it from helicopter.
Put laptop into same bag with leaking shampoo bottle.
Deliver damaged hard drive to data recovery company inside pair of dirty socks causing further damages during transport.
Leave banana on top of external HD enclosure letting its content spill to inside enclosure.
And most fitting considering primary aim of forum:
University professor heard whining noise from HD of new PC so for solving problem he opened HD and sprayed WD-40 to inside it.