Pocket Frogs. The point of the game is to collect all the different species of frogs by buying, trading, and breeding them. It has taught me quite a few things about writing.
Cut what is not needed. In Pocket Frogs, you are allowed eight habitats (16 if you're on the iPhone) which you have to buy throughout the game. Each habitat can only hold eight frogs. You don't have room to keep every single frog. You must sell all doubles and any frog you don't need for breeding. And don't worry, you can always clone that frog from your Froggydex if you need it later.
Combining two stories can make a stronger story. Sometimes you have two frogs and each has a quality that you need for your collection or breeding stock. However, you don't need any of the other aspects of the two frogs. What do you do? Breed them and make a frog that has all the qualities you want with the added bonus of, after selling those two frogs, more space.
Writing friends are a must. If you are playing on an iPhone, you have the option to trade frogs and items with your friends. Do it. It helps you, it helps them. Life is much harder without the help of your buddies. Trust me. I know. I'm the one playing on an Android.
*Learn more about Pocket Frogs here and here.
**All images found through Google.