First of all permalinks in wordpress, if someone doesnt know it yet, are the url that your post is going to have when it is live, given by the wordpress engine. As you can imagine this url should be search engine friendly if you like nice rankings and traffic coming your way.

I was experimenting with wordpress permalinks to see which fits better to my seo consept and I found a webpage writen from the official team here: Using Permalinks to be very usefull. There you can see that the basic structure follows some easy to use tags to construct your url, this are:

%year%

The year of the post, four digits, for example 2004

%monthnum%

Month of the year, for example 05

%day%

Day of the month, for example 28

%hour%

Hour of the day, for example 15

%minute%

Minute of the hour, for example 43

%second%

Second of the minute, for example 33

%postname%

A sanitized version of the title of the post (post slug field on Edit Post/Page panel). So “This Is A Great Post!” becomes this-is-a-great-post in the URI (see note below)

%post_id%

The unique ID # of the post, for example 423

%category%

A sanitized version of the category name (category slug field on New/Edit Category panel). Nested sub-categories appear as nested directories in the URI.

%author%

A sanitized version of the author name.

So if you want both author and the title of your post in the url you should use the appropriate tags. I beleive that the best url you can should involve title, category and should be as much as small as it is possible. All you have to do then, if you agree with this, is to go to your Admin panel then Options and fill in the gap as the following image shows:

Now you ve got your self a friendly seo url!