How to debug Linux scripts

I enjoy writing bash scripts as they will do a chunk of work for me within no time by just executing a single command.

But to make my script perform requested operation, many a times i need to debug it and make it work proper.

1) To debug a script use below command

$bash -x ./my_script.sh

2) To debug only part of a script use set -x and set +x at start and end of code snippet.

Ex:

$vim my_script.sh

#!/bin/bash

...

...

set -x

...

...

set +x

....

#./my_script.sh

3) In script, one can always use "echo" before any particular command to watch its contents.