Here are some of the ways to get energy in the game:

• Energy replenishes on its own until the energy bar is full. Log in regularly to take full advantage of your free energy.
• Use energy elixirs and drinks (they can be made in the Workshop).
• Remove stones, trees, and grass in expeditions and take home the bundles with resources that you get.
• Inspect your neighbors' decorations.
• Clean up at your knight's camp (for brides) or remove lava stones from your bride's estate (for knights).
• Complete achievements.
• Play the Desire game in the van or carriage.
• Make colonies and collect colony gifts.
• Buy energy on the Market for rubies.