You can take better pictures if you hold the + volume button down at the same time that you take a picture because that helps stabilize your iPhone. If you have your iPhone on a tripod, you can use your Bluetooth headphone or headphone volume buttons to accomplish the same thing without having to hold your iPhone.
There are other little known things you can do with your iPhone camera as well. You can take a picture by double tapping your Home button and tapping on the little camera icon that will show up to the right of your Unlock slider. Also, if you want to add a new photo album you can go to your iPhone Photo app and click Edit and then the Add option that will then show up in the upper left hand corner of your screen. When you do that, you will be prompted to name the new album whatever you want so you can keep your pictures better organized.
You can save images that you find out on the internet by holding your finger down on the picture for about two seconds. After that, a menu will slide in and allow you to Save Image of Copy it. You can also take screenshots of whatever is on your iPhone by pressing the Home button and Lock button down at the same time until your iPhone screen flashes white.