If you're looking at your To Do list for today and it's not showing any more Quests, there are two possible reasons for this:
A) your Quests aren't scheduled for today, or
B) you're haven't added enough Quests.
If it's the first situation, you can still find all of your quests under the "Quests" link. This is in your HQ on mobile, or linked from the left side of the screen on the website version. You can view and edit any Quest to change how often it appears in your To Do list.
If it's the second situation, it would probably help to start by adding a Power Pack. You'll see a link to Power Packs in your HQ on Mobile, or here on the website: https://www.superbetter.com/power_packs
If you still have questions, please get in touch with us and we'll try to help you out!