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Check out the presentation for a couple of templates you can pull into your account.
Analytics Dashboards and Reporting Presentation Slides (December 2017)
As you create reports and templates there is one CAUTION:
If you are creating a FILTER this permanently changes your data. It is advisable to instead create a SEGMENT which can be turned on or off without impacting your data. If you do create a FILTER be certain to create it as a VIEW.