I am a huge craft beer fan and I use RTM for my "beer to buy" list. Every week a lot of new beers are available and it's hard to keep track of all of them. It is very easy to keep track of what I want to buy and what I already bought using RTM.

Sometimes a beer is not avaible yet in my area so I have to wait some week.

I add "beer to buy" task at home. At the beer store I use RTM for Android on my cellpone...

Some beer goes to my cellar. If I wan't to know when I bought it, I just need to go back to RTM.