cropping and prints

I was wondering how to crop an image correctly so when you make prints they come out normal?

Select your crop tool and input the sizes and resolution that you want. This example is one for an 11x14.

if your sending them out to get printed professionally do I have to worry about this or just give them high quality JPEG?

1. The image should always be the same shape as the paper it will be printed on. E.g., if you order an 8x10 print, that paper has a 4:5 ratio, so your image should be cropped to that ratio.
2.If you divide the number of pixels in a side of your image by the length of the same side of the print (in inches) the result should be no less than 180. That number is known as ppi - pixels per inch. 300 ppi gives best quality, more is overkill but ok, and anything less down to 200 ppi will range from good to acceptable.
3. Unless the lab specifically requests a different color space, the image must be in the sRGB space.