I totally agree. Dh is a "collector" and I do hate to throw out useful things. So, we developed the 1 yr rule for miisc stuff. If it has been in the basement for 1 yr and not used--out it goes.
For food, we're developing a list of our favs with a section for things to try and then giving all of the cookbooks to the library.
In terms of the credit card, we use ours to simplify. We buy everything with it, earn cash-back bonuses and pay off the entire balance each month online.
I love the idea to cut back on soap and shampoo. There is no reason for the 8 bottles we have in there!