To care for your succulent container garden, during spring and summer - its growing season - keep the soil moist, not wet. It's better to let the soil get a little dry between watering than to over-water. During the winter, when plants are dormant, water much less frequently, keeping the soil on the dry side, but not letting it dry out entirely. Depending on the succulent plant, fertilize during the growing season with a diluted liquid fertilizer.
For more information on succulents:
Debra Baldwin’s book, Succulent Container Gardening