big blank spaces between written section and headers

I have been trying to sort an issue with a slider on the front page of my site and seem to have now created another problem of too much blank space between sections. This is particularly showing on the pages below. Can anyone help me sort this please, I have fairly basic knowledge. Thanks

wwww.wackynation.com – between the coming up section and the slower, crazier, funnier their is a big white space

http://www.wackynation.com/event-management – between phone number and case studies is a big white space

http://www.wackynation.com/about-us – written paragraph and meet the management is a big white space