Sometimes having too many ideas about something can overload your thought process. If you are getting stuck, take a break, move away from your computer, and do some free writing or concept mapping about the ideas you want to present.
Create circles on a piece of paper and put one or two words in each, then see how you could connect them.
If that doesn't work, try going for a quick walk to clear your head. A 15 min walk takes a lot less time than 45 min of staring at a blank page.