Nikon camera accessories?

I have £90 to spend on accessories for the Nikon d3100 what should I get?
I would like to get decent stuff but a lot of stuff at the same as all I have is the camera with 18-55mm lens and a bag?

What should I get please list essentials first and then others

A tripod for night shots and stability, some filters for your lens etc. If you want more lenses you will need more money.

Loads of stuff, but without knowing what type of photographer you are I can't recommend anything. Right now, just take your camera, instruction manual, and a decent book on photography (it doesn't even have to be one from this century!), and go shoot and learn the ropes. Understand your camera, and it's limitations, explore what you will possibly enjoy shooting. Once you've got a feel for things, you'll naturally gravitate towards the necessary lenses, supports and accessories.

My standard list in order of priority

1.memory card, any class 6 8gb card will do
2. A protective bag of some sort.
3.microfiber lens cleaning cloth for lens smudges
4. A rocket blower or similar
5.a lens hood if you rkit lens didn't come with one
6.a tripod

How's this: Two external hard drives where you can back up all of your pictures. Most people are going to cry the day their drive dies. Here's more stuff. A good polarizing filter is nice to own. A cleaning kit for the lens. Extra battery is a must in my eyes. Extra memory card. I would not get a tripod unless you really need one and then I would not get one that is that cheap because it will be junk. Software for your computer. Calibration software for your monitor, better monitor.