That is the best option by nature, but for those who don't wish to make such an investment, the best thing to do is to experiment with the camera you have. Daniel, I have a similar camera, and I have found that simply playing around with it has given me amazing results. But don't forget the number one tip, hon-- Remain perfectly still.
Also, try practicing a little bit more above ground before you work your way into underground and night shots. Practice makes perfect!