Even if you don't have time to play this game, login at least. Then login bonus is sent to your gift box.
Clear Daily Missions
First thing to do is clear daily missions to earn 100 Progress Points. Then you can get Royal Points and Visiore from the treasure chests. Don't forget to tap the treasure chest icons to claim those rewards.
[List of Daily Missions]
Clear Story Quests 5 times
Clear a Hard Quest from the World Quest List
Clear the EXP Chamber
Clear a Multi Quest
Enhance an Equipment Item
Perform a Normal Summon
Purchase 1 or more items from a Shop
Send a Gift to a Friend
Collect items found during Chocobo Expedition
Compete in the Duel Arena
Perform a Video Summon
Visit the General Shop
Visit the shops (general shop) and trade gill for items and visiore for unit shards. On the JP server, selection of the items are updated at 5am, 12pm, 6pm, and 0am.
You can switch the selection for free once a day by tapping a "Update" button at right bottom corner. For more switches, you have to spend visiore.
Free Normal Summon
You can do normal summon for free 3 times a day.
Collect Items from Chocobo Expedition
Pick units that go exploring with chokobo and choose 1 location. After certain times past, those units gain exp and bring Gil and items to you.
For 2 hours, 12 items are picked up. You have to tap "Collect" button for acquiring them and securing item slots.
Tap "Attend" on the Guild
On the Guild menu, tap "Attend" the you can receieve rewards depending on your attendance and Guild Statue Level.
Send & Receive Guild Medals
Tap "Gifts" on the Guild menu and send/ claim gifts.
Enhance Guild Statue
Some guilds require members to enhance Guild Statue everyday. Don't spend Visiore for ehnhancing though.
Replenish the Provisions Warehouse (Barracks)
By replenishing the Provisions Warehousem you can turn on the Barracks effects: Increasing Bravery and acquiring unit's JP.
Send & Recieve Friend Medals
Send gifts to your friends every day, then your friends also send you gifts. This is also one of the daily missions.
To avoid a gil shortage (it happens frequently), I recommend you to farm Gil Chamber everyday. It's attemptable 3 times per day.
On Monday, drop rate is doubled. On Saturday and Sunday, the attempt limit is removed.
Growth Egg Chamber & Pot Chamber
Attempting Growth Egg Chamber & Pot Chamber is the main way of getting Growth Egg and Armor Pots/Burst Pots.
Participate in the Guild Battle
Guild Battle opens from 9pm to 11pm every night. Some guilds require members to participate in this.
Battles are auto.
Attempt Hard Quests 10 Times
You can get 1 Unit Shard from a Hard Quest. Each Hard Quest can be attempted 1~3 times, and Hard Quests in total can be attempted 10 times a day.
For example, 1 Mont Unit Shard can be obtained each time you attempt Mont's Hard Quest. Since Mont is a MR unit, you can attempt that Hard Quest 3 times a day.
Mediena is UR, so that you can attempt her Hard Quest 2 times a day. Gilgamesh is a special UR and it's Hard Quest can be attempted only once a day.