We use cognitive flexibility every day.

• Identify the problem and write it down.
• Reverse the problem. Ask how you can cause the problem (instead of how you can solve the problem)
• Brainstorm the reverse problem to produce reverse solution ideas. Accept all ideas at this stage.
• Now reverse your brainstorme...

How about being flexible in choosing work hours aa per your productive time?

There are people who are active in morning & then there are peeps who get work done at evening hours. Creative people get to choose their hours but not a scenario in corporate lives. So here's the thought-

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Allocation is giving other people work to do.

Delegation is giving other people some of your own work to do, where you give them the whole problem to solve, not just a task on its own.