When you renew your passport, you can also get a passport card for an extra $30 or something. They're only good for land/sea crossings (no flights) from US to C

When you renew your passport, you can also get a passport card for an extra $30 or something. They're only good for land/sea crossings (no flights) from US to Canada, Mexico, but you can put it in your wallet. The downside is again that it's non-standard form of ID, but it is a photo ID and may be useful