Keep headers/logos under 125 pixels high. It takes up valuable viewing space, especially for laptop users, that is best left for the good stuff to appear"above the fold" Take a cue from the big companies, simple logos done well say it all. This is our #1 pet peeve - screaming logos and headers!
Cloning your site is just another degree in rename your login url to secure your wordpress website which may be useful. Cloning simply means that you've backed up your website to a completely different location, (offline, as in a folder, so as not to have SEO problems) where you can access it in a moment's notice if necessary.
I might find it a little more difficult to crack your password if you're among the ones that are proactive. But if you're among those ones, I might just get you.
Luckily, keeping your WordPress website up-to-date is one of the simplest things you can do. For the past couple of versions, WordPress has included the ability to install updates. A new upgrade becomes available.
BACK UP your site and keep a copy on your own computer and storage. If you have a very active website, back. You spend find out here now a whole lot of money and time on your website, do basics not skip this! Is BackupBuddy, no back up database, widgets, plugins and your documents. Need to move your site to another server, this will do it in less than a couple of minutes!
Do your homework and some searching, but if you're pressed for time and want to get this done once and for all, try out the WordPress security plugin that I use. It is a relief to know that my site (and company!) are secure.