Varieties will vary week to week, with availability and growth.
Temperatures averaging 70°F/21°C - 80°F/26°C are very good and not much below 50°F/10°C.
Succulents thrive on bright light conditions, but not direct sunlight. Heat is fine because they react similar to a cacti in hot conditions. Bright rather than light (direct), is the key.
Succulents are mainly made up of water and retain a lot of water in their foliage (for storage), similar to a cactus. The soil needs to be moist which is easy to check by placing a finger an inch deep into the soil to make sure it is not dry. It needs much less in the winter. .
A pot mixture used for cactus will suffice or a soil mix that drains well and is well aerated.
Re-pot when the plant has outgrown it's pot. It's best to re-pot the offsets (small succulents - pups) in separate pots once they have grown enough.
Humidity is not a major concern for these, making the average room indoors sufficient.
Offsets can be divided carefully and then re-potted. Pups will grow from the parent plant which are best removed when they are about 2 inches long, or when the main plant needs more room to grow. Leaf cuttings can also be taken and re-planted, although this method is not as successful. I would let cuttings dry out for at-least a few days before placing them in soil mix. Drying out allows time for the wound to heal and improve it's chance of growing.
Where they grow best:
As mentioned above these love bright conditions, making them a plant that will grow well on a shelf, windowsill or other area, without direct sunlight.