Round in form, with leaves emerging from the center to form a rosette shape - this is how a lot of succulents grow, but some of them look a lot alike. Here are some to check out a little closer if this sounds like your plant.
They need warm and bright conditions, all year. Click on the picture that looks most like your plant, and get more details;
These are tough, resilient, and don't mind a cold dormant period - with frost and snow;