Just on the Credit Card front... if you are staying in Hilton branded hotels "most of the time" then I would suggest the HH Amex. The points to $ spent ratio is quite good. Details
here.
HH Gold level is earned once you spend $20k on your HH Amex. You will have HH Silver as long as you have the card..
Check out the
HH forum for more info.
It can be overwhelming, but don't give up. It is so rewarding when you are able to make use of all those points and miles.