Don’t gamble; take all your savings and buy some good stock and hold it till it goes up, then sell it. If it don’t go up, don’t buy it.
—Will Rogers

Web site backups may be boring, but they’re essential to good web hygiene. Here’s the official WordPress guide to backing up your blog (and yes, you MUST back up both the site and its associated database).
Here’s how.

Another great service from Google: here are a couple of methods for finding incoming links to your site.

Here’s an indispensable link for bloggers: Google’s Webmaster Central Blog.
This handy tool will keep you in the loop regarding Google’s spiders and their policies about site indexing for Google searches.
Help make the internet a better place by cleaning out any comment spam or other nuisances that might be costing your blog precious [...]

A celebrity is one who is known to many persons he is glad he doesn’t know.
–H.L. Mencken

Here’s a link to Google’s Official Blog; keep yourself up to date on Google’s latest innovations: Google’s Official Blog.