Using production-like data for development
Set up sanitized production-like data for development early on, as it helps working with real world data that users have in production. You're able to prevent some bugs from happening because you can test more cases in your local, and in general it's just more pleasant to work with prod-like data
Just make sure to sanitize all PII (personally identifiable information) like names, e-mails, addresses, phone numbers, any payment information, etc
Now the question is - what to replace that data with? - I use fantastic faker gem. It has huge variety of random data generators, on the screen - few samples!