Display Page content in sidebar

Hi

Is it possible to display the contents of a page in the sidebar but limit the amount of content displayed?

I would like to create a page with content updated daily but I would only like a small section of the content to display in the sidebar. I can’t limit the number of characters displayed as this would vary day to day. It would be good if I could somehow implement the more tag or something similar but I’m not sure how to achieve this.

I have had a look online and throughout these forums but couldn’t find anything similiar or a solution.

Any help would be greatly appreciated.

Thanks