Back up your blogs
“Things change. As they say in quantum physics: If it can happen, it will happen.”
So, if you can, please back up your blogs every time you will make changes. When you will do, it will be like you are assuring yourself that you are secured no matter what. It is just so hard to be sorry whenever one of your sites will collapse for no apparent reason at all.
I’ve been repeating this many times because internet and web servers are so unpredictable. Even if the web hosting company is big and the best of all but all they have are machines in which it will fail without any warning. Those machines will work 24 hours a day 7 times a week in 365 days a year, has a life span and it will also get exhausted like any other things.
So, when you need to be secure in the blogosphere, do back up your blogs regularly or every time you will make changes! (You can use TOOLS, then, EXPORT OR just visit wordpress.org codex at http://codex.wordpress.org/Backing_Up_Your_Database.)