Linux: how to kill hanged process

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Sometimes, when I am working on Linux, some programs are hanging system, so further work is impossible.
I am using this set of commands to find out PID and other data of hanged process in good readable format (KeePass as example):

$ ps aux |head -n 1; ps aux |grep -v grep |grep -i pass
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
1000 29015 13.1 0.2 824732 40408 ? Sl 14:56 0:02 /usr/bin/mono /usr/bin/KeePass/KeePass.exe

Using this command below to terminated hanged process:

$ kill -s 9 29015

Do you have something to say more on this subject?