Jump Break Problem in Blogger

I am having difficulty creating a jump break in my blog post. It looks dull and boring to see a single post is a foot long, sometime even longer. As everyone tries to adapt to newer widgets and features, it necessitates me to spend a little on bringing some changes to the appearance. The current theme doesn't represent my optimal style, still, I think the simplicity of it matches my taste.

I have installed the current theme in 2009, and I can't exactly remember where I found it, and who has designed it. It's, as resembles, a basic Wordpress theme called "Pilcrow" (see the theme on wordpress website).

Is there anyone who could help with the xml codes? I attempted several times to change the codes, but wasn't successful. I would appreciate anyone who could assist me to solve this problem. To contact me, please use the contact form on the right column.