To create a new report, first choose what type of report to create as shown in the previous screen shot. At that point a form like the following will appear:
Give the report a nice title so that you will remember what it is months later and so that other members of your scouting unit will understand what it is as well. Then check off each field you'd like in the report. If you want it to be sorted in a specific way, use the sort by drop down to set the sort. Click "Create Report" to save the report and to see its results. Here's a sample user report I created for determining who is eligible to be inducted into the Order of the Arrow.
After you create a report you can access it anytime from the report powerbar.
Don't see the type of report you'd like to create or think an existing report type is missing important fields? Just open a support ticket, describe what you'd like to be able to do, and I'll do my best to make the data available for you to report on.