How we can make our site more secure

Recently one of my friends domain panel was hacked and some one transfer domain own godaddy account. It sound so painful if you site and domain hacked, what we can do to protect our domain panels..and how..
Thanks!

Probably the first thing is to check that you have good passwords on the accounts - there's plenty of places that let you generate good passwords or articles on how to come up with them. Basically, it should be gibberish - no recognizable words, and use a mixture of uppercase, lowercase, numbers, etc.

Also, watch out for bad passwords on email accounts! For example, if you use a gmail account for your domain stuff and the email gets hacked - they may be able to use the "forgot password" feature on a lot of websites to send a new password to the hacked email account.

html injection is a problem ofter found in many websites.
Using a parser that interprates the variables could help improve security.
Avoid using "get" , try using more "post" function

The moral of the story here is never use the same usernames and passwords on different sites.

They should all be totally different and the password should be of the form, sdHH{'23umM using a combination of lower case, uppercase, numbers and special characters.