About 6 weeks ago, I decided that my phonebanking this year would be focused on increasing Latino turnout in AZ. I called, wrote, and signed up for multiple campaigns and GOTV efforts, and, perhaps partly becaus I'm a US expat in Guatemala, none of them responded usefully. A few days ago, I figured out how to use http://fan.workersvoice.org/ to do AZ GOTV: sign up, go to your dashboard, and at the top right of the page body, click on the "initiative" and change it to AZ/Carmona. That gave me lists of 15 voters at a time, and about 1 per list on average had a Latino last name. But for each call, you can just click "Skip" (followed by "don't want to talk to this person right now"). As I "skipped" everyone who didn't have a Latino last name or live in a district 9 town ("southern Phoenix, as well as all of Tempe and parts of Scottsdale, Mesa, Chandler and Paradise Valley"; where Kyrsten Sinema is in a tight race), the proportion of Latinos per list grew, and now I'm getting over 80% Latino, with maybe 15% of those being Spanish-speaking. I don't know what algorithm Worker's Voice uses; it may have something to do with Facebook or something; but in any case, I'm happy to be able to make the calls I want to. I thought I'd share, for anyone else who wants to do the same.
If anyone else has similar tips, please share them in comments.