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!
Through the use of a clean hacked wordpress site backup plugin, the best way to ensure that your is in my view. This is a relatively inexpensive, easy and elegant to use way to make certain that your website is accessible to you in the event of a disaster.
Use strong passwords - Do your best to use a strong password, alpha-numeric. Easy to remember passwords are also easy to guess!
Before you can delete the default admin account, you first must create a new user with administrator rights. To do this go to your WordPress Dashboard and click on User -> Create New go to the website User. Then enter all of the information you need to enter.
Note that you should only try this step for setups. You will also have to change of the table names within the database, if you would like to get it done for installations.
The plugin should be regularly updated to stay current with the latest WordPress release, play nice with your plugins and have WordPress cloning and restore capabilities. The ability to clone your site (along with regular copies ) can be useful if you ever want to do an offline site redesign, among other things.