Nikon d3100 help and info?

I'm a newbie to photography and just got a Nikon d3100 is there any cool things I should know about it or any good accessories for it?

Read books on photography is the best thing to do

make yourself familiar with the camera and all the controls

other than that, read through your manual, and start learning about photography.

Cool thing to know: Before asking a question, read the manual.

Good accessory: Neck strap, wear it all the time.

Another cool thing to know: After reading the manual, fire your questions here. We'll try our darnest to help to you out.

Exactly; Strap and Manual- both are vital. (I've lost count of the number of questions that begin, 'I dropped my camera and… ' it ALWAYS ends in a new camera. I haven't dropped a camera in more than 30 years of photography because the first thing I do is wear the strap).

I'm assuming you got the body and 18-55mm zoom. The best way to learn is to play with it and find out what each bit does. Just don't drop it or get it wet.

All the "cool things" you need to know about your Nikon D3100 will be found by reading the Owner's Manual that came with your camera. This video will also be very helpful:

http://www.nikondigitutor.com/eng/d3100/index.html Who better than Nikon to teach you to use your Nikon D3100?

The best accessory you can have is knowledge of photography. One of the first things you need to learn about is the Exposure Triangle which is made up of Aperture, Shutter Speed and ISO. This site will teach you how those three elements combine to make a good exposure.
http://www.digital-photography-school.com/learning-exposure-in-digital-photography This site also has tutorials on subjects such as Composition and Light that you should spend time reading.

Another valuable accessory is learning to think. Good photography requires thinking. Learn to think about the light, composition and exposure before you release the shutter. Ignore anyone who tells you to "Just go out and shoot and shoot and shoot and shoot. That's how you gain experience." No, it isn't - unless all you want to gain experience doing is taking snapshots. A "snapshot" is a picture with poor composition or poor lighting or poor exposure and all three can often be found in one snapshot. So learn to think about the light, composition and exposure before you release the shutter.

Buy a Skylight or UV filter to protect the front element of your lens. If you plan on doing a lot of outdoor photography buy a Circular Polarizer. A polarizer is used to enhance colors, darken a blue sky and will remove/reduce glare/reflections from water, snow, glass, sand and painted metal - but not polished metal. Always remember this: "A good filter isn't cheap and a cheap filter isn't good." So ignore those '3 Pack of Digital Filters for $9.99' you find on eBay or Amazon. Choose from B+W, Hoya or Tiffen.

So read the Owner's Manual, watch the Nikon video, spend time at the Digital Photography School site and begin learning to think about light, composition and exposure.

The only must have is a memory card, time and the mindset to learn to use it.