Last time I checked, most places still use voter rolls as the starting point for sending out notifications for jury duty.
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Some places/jurisdictions now use drivers license rolls instead/in addition to choose jurors.
Every place I've lived has used both.
I think the biggest improvement to the present jury system would be to provide a comfortable place for prospective jurors to sit while waiting to be called. I've experienced both the good and the bad, and it made a huge difference in my attitude.