How to move posts into a differnt order?

I am not sure whether I understood correctly. I think you want a particular post to always stay on top of others. As others have pointed out, you can change your posting date to few years from now. Another option is to insert a text page element on top of your blog posts page element. You could write whatever you want in the text element. It may not look like a post. It may not be suitable for a long post. But, if you are looking at something like a short description of your blog, or you want to drag the reader's attention to something, you can do this. This is similar to displaying a 468x60 add on top of your posts. The advantage of this approach is it will stay there even if you open your archives or item pages. Thanks. Regards, http://assessmyblog.blogspot.com/

Such a thing is called a "sticky post". Other platforms have that option, but in Blogger, like what the others have mentioned, you just have to set the date to a future date. As of now, forward-dated entries in Blogger are made "sticky". However, some bloggers want forward-dated posts to be automatically published on the exact date (to enable them to write drafts that will be automatically published in the future, even if the blogger is offline), so the method we've mentioned might change in the future.

like what others have said, just play with the date. I believe that there's an option near the tags for more option during posting, it will expand the lower portion and will show the date, you may alter it.

Well, basically, you'll just have to play with the post time and date entry. That's the only way I can think of at the moment.. =)