Figuring out which tasks we should do next is not always an easy decision. 

So instead of using your precious mental energy for decision making, let Marvin decide for you!
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If this strategy is turned on, you will see a lightbulb icon at the top right of your daily list or any Smart List you have in your day view (via the custom sidebar or custom squares for example). Clicking the button/icon pops up the task Marvin thinks you should do next.

He takes many factors into consideration, but his exact thought process is a secret. He will get smarter over time, giving you better and better suggestions.

In the strategy settings you'll find an option for having a big suggestion button in your day view and this way you can get a suggested task even faster.

And here's how those 3 buttons look like:

If you have one of these selected and it's not showing up in your day view, make sure that it's not hidden.

If you just want to get a random task instead, use the random task strategy.