Not many people are interested in everything, so find some categories that you want to talk about and add it to your favorites (click the little star icon). By default you'll be emailed whenever a new moot is posted in your favorite categories (you can turn off emails by clicking the little envelope icon).
If you can't find one that interests you, create your own .
yoomoot is designed to function as a family of overlapping niche communities, centred around categories.