I am tired of my pathetic old fashioned accounting system of envelopes and check marks. Is there a software package out there that can help organise my travel life?

I frequently never get credit for car rentals, some flights seem to disappear from my MEMORY (in fact entire days do). What I need is a program that allows me to keep track of my flights, hotels and car rentals. If I could input my data and check it off when it is credited. After a certain amount of time, if there are some uncredited, I would like to see a "heads up" warning. Ideally, I could double click and I will get to a mileage discrepency/claim form to resubmit.

Any ideas?

I am already with Amex and got ripped off with maxmiles tracking systems. These are just glorified reporting systems and not tracking systems. I don't want to know what I got credited for, I want to know what I did not get credited for.

Help!!