People become motivated when they get autonomy (the power to decide certain things themselves).
More delegation creates energy and makes things more fluent (you avoid being an obstruction).
People grow when making important decisions.
You give people the power to make their own decisions but under the condition that they use the advice process.
You can do this for small and big decisions.
The advice process gives co-workers the opportunity to make decisions about quite big topics under the condition that they ask the advice of all of the parties involved. In essence, the delegate only has to consult interested parties, it is s/he who makes the final decision. Of course, s/he must be able to defend their decision with facts and figures
It is up to the co-worker themselves to determine/investigate who to consult. However, it should never be the case that an important stakeholder is surprised by a decision.
If needed you can support people in applying this approach by coaching and facilitating them step by step (only the first time!).
When you want to empower your people by giving them more autonomy and decision power within the controlled framework of the advice process.