How can I fix my rear lights and dashboard light on my Nissan Micra?

The last three weeks my fuse for the dashboard light and rear lights has blown twice. I have replaced them every time, but now I think it is a bit strange that it has blown it so often. It was pointed out that one of my brake lights was not working aswell. Am getting a bulb tonight, could they be linked? But they are not the same fuse?

Help

thanx