I wouldn't call this excellent advice - kill -9 will rob the process of the opportunity to clean up after itself and leave everything in a good state (e.g. any binary files being manipulated by the application). So I would use this as a last resort - start with Ctrl+C and then "kill INT %1" and then "kill TERM %1" before "kill KILL %1".

(For those who don't know "kill KILL" is equivalent to "kill -9". And despite the name "kill" is a tool for sending signals to processes.)