If you live in an area where you have a choice of ISP then at least inquire about whether they support IPv6. Chances are if you have a choice the factors other than IPv6 will make more of a difference. I.e. I'd have a hard time recommending an IPv6 enabled 6Mbit DSL connection over a 100Mbit cable one without.

I've certainly kept ISP choices in mind when choosing which community or neighborhood to live in. Ironically I find myself looking for places with Comcast because they've had solid IPv6 support for years.

If you are involved in a decision making capacity with a company that offers services over the internet, try to pick equipment, ISPs, SaaS vendors that use IPv6 where possible. With a few notable exceptions (rrrrrrr AWS) its not particularly difficult anymore. If you are at trade shows, quiz vendors about their IPv6 support.

Lots of ISPs have gotten on board recently at the cores of their networks but CPE equipment is often old (DOCSIS 2 modems, WRT54G bases). This holiday when I was visiting family I took a few minutes to swap out their ancient router for one that supports IPv6. As a result they'll also get faster and more reliable Wifi now so its often an easy sell for other reasons.