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!
I back my blogs regularly using a free plugin WP DB Backup up. If anything happens I will restore my website to the settings. I use WP Security Scan plugin that is free to scan my blog regularly and asks to be blocked by WordPress Firewall to fix hacked wordpress.
Hackers don't have the capability once you got all these lined up for your own security to come to your WordPress blog. You can have a WordPress advice account that provides you big bucks from affiliate marketing.
I don't think there is a person out there that after learning how much of a problem WordPress hacking is that it's a good idea to boost the security of their blogs. Something I've noticed through the years is that when it comes to securing their blogs, bloggers seem to be stuck in this state that is reactive.
You can get an SSL Encyption Security for your WordPress blogs. The SSL Security makes encrypted and secure communications More hints with your blog. So that all transactions are listed, you can keep history of communication and the all the cookies. Make sure all your blogs get SSL security for protection.
Always keep in mind that the safety of your blogs depend on how special info you handle them. Be sure that you follow these tips that are simple to prevent hacks and exploits on your own blogs and websites.