how to made a sitemap for a blog ?

its been a week since i am here. scratchin ma head to know how to create a sitemap for my blog.
still i am unanswered. i need help from you guys. can u explain a little how to create that file so i can get a better google page rank.
thanks

If it's a Wordpress site you might try Dagon Design.

Google 'create sitemap' (without the quotes) and you'll see a heap of results where all you need to do is input the URL and a downloadable sitemap will be created for you. Upload this to the root folder of your website.

As Nookie Monster said above, if it's WP try Dagon Design. There are a few other plugins for WP that create sitemaps for you too.