OK, a follow up question - how do you stay organized?

I expect that eventually much of the information I am gaining by reading at the links recommended above will be permanently stored in my head, but for now it's a jumble. What is a manageable, portable system for knowing which hotels/rental cars/restaurants are partnered with which airlines for miles?

Also - I joined Delta's Skymiles today and then joined the restaurant rewards program. Now the dinner the wife and I were planning for this evening is going to earn me 1,000 bonus Skymiles (plus a mile per $1 spent). This could become addictive.