What are some methods you use to chase your clients for payment?

Hello guys,

I got a client whose been delaying the web design payment for like 7 months…

Im getting really frustrated and wanna take a 3 hours drive to his place to bash him up…

Or im thinking of making him assume that im hiring a lawyer to sue them for late payment etc…

Tell me more about you guys and the method ya’ll use =)

With warm regards
d0dge