I noticed that some links got broken the older post I mean......

1. Thanks ryan. I visited your blog and really you did use "/%postname%/%year%/%monthnum%/%day%/" I considered that and filtered out from my list earlier. The reason is that year/month/date already is a burden to the URL, putting them at the end have worse effect.

1.1 each slash "/" mean a folder. So you actually put your page 4 level deep in the site folder structure, and still have the postname as the firs parent folder. This doesn't help in SEO and navigation.

1.2 when you want to archive (backup) your site into html, you will have trouble because, let say you have 1000 posts, you will have 1000 folders, and then under each folder you have year, under that you have folder month, under that you have folder day. Total add up 1000x4 = 4000, under which have total of 4000 index.html file.

1.2.1 that lead to the /year/month/day/postname still the better option, because it will group posts in the same day, full feeling of time relevancy.

1.2.2 that lead to the /year/month/postname better option, because even less folder involved while keeping a fair feeling of time relevancy.

1.2.3 that lead to the /year/postname also an option, shorter, but less feeling of time relevancy.

1.3 however, reading the management of folders, the posts at root /postname without any trailing, also cause trouble when it's too many folders.

Conclusion for 1: If you like the trailing date, you could use the hyphen "-" instead of slash "/" (ie: /postname-year-month-day) so that no extra folder is created.

2. Thanks Simon for very quick focused comments.

2.1 For question 1, yes indeed I found WordPress.com stripped of "www". I also researched a lot and found many big names are stripping off the www and joing the non-www.org.

2.1.1 The matter why I still keep the "www" is for, in case I use more subdomain, to keep track of my own main site using the "site:binh.name" Google search query, and adding binh.name as an URL channel for my AdSense.

2.1.2 So, i still have the dilema between
- shorter name (in this case I have only 4 letter domain name + 4 letter TLD add the dot equals 9 letter total), or
- enable URL tracking for main domain using "www".

2.2 For question 2, I guess I know what you mean, if I focus on blogging then use option "a".

2.2.1 Actually I don't know this either. I can write a lot of quality articles that shouldn't be counted toward time, at least should be valid for years to come. For those articles I really considered putting them in as pages.

2.2.2 I also consider writing short blog entries. So I may actually put some subdomain just called "blog" or something similar. I mean really short 1 or 2 paragraphs just to tell what I am doing/planning without spending hours formatting and categorizing.

for item 2 , it should be "a" unless your blog is it the main focus of your website