Clearing up space on an iPhone?

I'm having trouble clearing up space. I have not that many pictures. Only 4 apps downloaded myself. Cleared all of my useless texts, emails, history, and reminders. I even deleted some more pictures. What's the most efficient way to clear up space on an iPhone 4?

I can't really give you any tips, other than look at how much space all those apps take up… I was having the same problem. Then I realized one of my apps were 6.1 gigabytes. That's a lot lol!