I am planning to have my own website and would like to ask some questions regarding about the organization (I don't know if this is the right term for it) of domain names.  Let me give an example:If I have a domain named www.joe.com but is planning to have different websites or categories for my varied interests but would still retain the  joe name on my domain, would it be better to have a sub-domain instead?  Is that it?  Is this what would turn out:www.joe.com             = my main sitebookworm.joe.com        = a blog for my love of bookstravel.joe.com          = a blog for my travel experiencefood.joe.com            = a blog for my love of food and cuisineI also notice that there are other websites that are like this:(this is just an example, but you get the idea)www.personname.com          = main sitewww.personname.com/blog     = a blog for his site ( is this a subdomain now)Everytime you go to the www.personname.com, you are then redirected to the www.personname.com/blog address.  Is it safe to say that the blog address is a sub-domain and for blogging only and then the www.personname.com is the main site?  What is the difference of this approach compared to the first example I've given above?Cheers!
Advice on planning domain names
domain registration
It completely depends on your SEO preferences. What you're referring to is 'sub-domains' and 'sub-directories' whereby a sub-domain would be blog.joe.com and a sub-directory would be joe.com/blogGoogle considers sub domains as completely different websites meaning if you rank well for joe.com you won't necessarily rank for blog.joe.com, sub-directories do receive 'link juice' from their parent domain.The benefit of using sub-domains is that Google will only show 2-3 results in search from each website and as your sub-domain is considered a completely different website you can rank twice as many times, therefor dominating the search results. It also allows you to target varied keywords without diluting content.My advice would be to use sub-directories, that way any SEO effort/links pointing to your site will benefit the entire site, they're a lot easier to manage too.