What are good tasks for "not enough time to start on something big" moments?
It happens fairly frequently that I'll finish up a big project or get done with a meeting around 30-45 minutes before my time to go home.  There are usually things that need to be done, but it usually isn't worth it to start on those projects with only 30-45 minutes to go.

What are some good things to spend that time doing?
What are good tasks for "not enough time to start on something big" moments?
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It happens fairly frequently that I'll finish up a big project or get done with a meeting around 30-45 minutes before my time to go home.  There are usually things that need to be done, but it usually isn't worth it to start on those projects with only 30-45 minutes to go.

What are some good things to spend that time doing?