The beauty of digital photography is that it has brought down the price of taking pictures. In the days of film, each click of the button meant that we had spent some money. If you were using 8x10 transparency film, it meant $10 before you even processed the film! With digital there is no additional cost to click the button other than wear and tear on your camera.
As a result of this we are clicking more often (which is not necessarily bad) but we are also deleting more as well (which is not necessarily good). Enjoy taking lots of photographs, but take your time reviewing your photos when you are done shooting. Don't be so quick to delete, you may be deleting your history!