It's also important to change your password and admin username if someone needs your password and admin username to login to perform the work and helps you with your blog. After all of the work is finished, IMMEDIATELY change your password and admin username. Someone in their company might not be, if the man is trustworthy. Better to be safe than sorry!
Backing up your blog also helps in procuring from fix wordpress malware virus hackers. You must keep a copy of your documents hide away in system so that you can be certain of your database. This makes you a protected backup files that serves you in times of down is the machine. Hackers are not as likely to slip from a bonded back up system.
There are ways to pull off this, and a lot involve copying and FTPing files, exporting and re-establishing much more and databases. Some of them are very complex, so it's imperative that you go for the one that is right. Then you might want to look see post into using a plugin for WordPress backups if you're not of the persuasion that is technical.
Yes, you need to do regular backups of your site. I recommend at least a weekly database backup and a monthly "full" backup. More, if at all possible. Definitely if you make changes and additions to your website. If you have a community of people which are in there all the time, or make changes multiple times every day, a daily backup should be a minimum.
Black and phrases that were whitelists based on which area they appear inside. (unknown/numeric parameters vs. known post bodies, remark bodies, etc.).
The plugin should be updated to remain current with the latest WordPress release, play nice with of your other plugins and have WordPress cloning and restore capabilities. The ability to clone your explanationuseful content site (in addition to regular backups) can be useful if you ever need to do an offline site redesign, among other things.