Diet and exercise regime are the key area's of focus without a good diet and good exercise plan, your just pissing your money away on supps. You can't have a half azzed attitude towards your lifting regiment and expect results. You have to plan. You have to do your research. You need to learn how to diet. Then after you have achieved some amazing relults on just protein powder and sound diet, (maybe some vitamins) and you have started to reach plateaus and you have a lot of research under your belt from months of months of reading, you can then start to plan what types of supplements might help you push through plateaus. Be carefull though because plateaus may not be real plateaus you very well could get a lot more out of changing your style of training or making adjustments in your diet.