just do it once. and you will see that it makes so much sense. i heard that some cameras do shoot jpeg and raw at the same time. use this if you want to try first. it took me a while to find out how to use adobe camera raw (acr) so that the photos look great. but if you take a course this might be easier.
i wouldn't want to shoot without it anymore.
laptop hp pavilion g with 2nd monitor, pse 10, lightroom 3, acdsee 14
camera: samsung galaxy I and canon 600d (rebel T3i), lenses: canon EF 50 mm 1:1.8 II, canon EFS 18-55 mm 1:3.5-5.6 IS II