Material Sources & Adaptation

The new shows I will be following:
Danganronpa The Animation & Rozen Maiden Zurückspulen

Now many people are suggesting you read the Manga before watching this new version of Rozen Maiden because the first episode pretty much covers all seven volumes? Also the prior series and OVA apparently have nothing to do with this new series at all but I would still suggest you see them because they are quite good. Now I still do not have the Danganronpa game. I ordered it but won't receive it until the end of the month, so I'm wondering if I should wait until I play the game before seeing the anime adaptation. Here is my question, do you go out and read or view the materials that the anime adaptations are based on before watching the show? I can't say I do that all the time, but I do when I can.