What if I consolidate all my debts into one payment?

Well, I am not sure if I consolidate all my bills into one payment will that ruined my credit or not? Also for example, if I choose "Credit Guard" what will they benefit from me that they would want to help me? Is that a good idea because I am tired of paying for my debts and I never see any money from my paychecks. I know it was my fault, but now I want to get out of debts. If any one can help clarify these questions for me because I am very clueless about these things.. Thank you