@paint guy: you make the post “sticky” here:
go to “all posts”, select the post you want to be sticky, click “edit” – on the right hand side of the screen in the “publish” box, select “edit visibility” – the menu will expand and there you can mark it as sticky.
But, if someone could help me figuring out, how to have the slider with sticky posts on my blog/home page, I really would appreciate it. this is confusing as hell. I just don’t get it done… strangely I get it to wok on any other page….