- It can be more convenient to use one back-end to write all your blogs;
- It is good SEO practice to have dedicated domains per blog topic;
- Your followers might have bookmarked your old blogs, and you want to hold on to their domain names but move your main blog elsewhere.
Using Autohotkey
If you're using windows (any version), there's an easy way of automating many routine tasks: the popular tool autohotkey (AHK). Not only is it the quickest way of automating simple windows tasks, it also lets you record or write macros and is much, much more powerful than a batch-file.
Using dlvr.it
Thought you need a bulky application like hootsuite or tweetdeck to achieve decent reach for your feeds and posts? Think again. With dlvr.it you can set up multiple "route" from RSS-source to FB, TW, or tumblr-target. Did I mention it's free?
Wordpress vs. Drupal
By many considered the nr. 1 and nr. 2 content management / blogging systems, there are a few stubborn preconceptions we have to do away with. Here are two extremely active open source communities that both produce great software products. I'll explain what to use in which situation.