If you want to regularly receive new ideas for things such as dinner recipes, you can subscribe to topics or to users with interesting collections, as well as to specific collections. All new cards from these collections will appear in your Feed.
To do this, simply click Subscribe on the page of the particular topic, user or collection.
To view your subscriptions, click My collections in the screen's upper area and select Subscriptions. If there is no My collections button, first click in the upper-right area of the screen.