Succulents love light! Depending on the type, they need on average around 6 hours of sun a day.
To ensure even growth try rotating your plants
frequenty!
Succulents do need water, but overwatering can kill them! They
grow in Spring and Summer, so that's when they need more water
than in the fall or winter.
You can test the soil with your finger - if the top inch is
dry, give your plants something to drink. Remember to water the
soil directly!
Both indoor and outdoor plants will inevitably catch some dust,
which an negatively affect their growth.
If you see too much buildup wipe the leaves and spines off
gently with a damp cloth (or a paintbrush!).