Chronological Posting

I have just recently set up my first WordPress blog. While I am familar with coding html and php to a certain extent (experience gained from modding & running several phpbb forums), I am unable to figure this out. Basically, I want the posts to show in the order they are created. I.E. If I create a post dated July 11th, 2005, I want it to show above, not below a post dated July 12th, 2005. I’ve searched and found a couple of options for older versions of WordPress, but couldn’t seem to make any of them work on the version I have installed (1.5.1.3). Any help would be greatly appreciated. ??