DS-11 or DS-82
Passport book vs. passport card
The card is cheaper and fits in a wallet, but it only works at land and sea borders with Canada, Mexico, the Caribbean, and Bermuda.
steps
Step 1
Decide whether you'll ever fly internationally
If yes, you need the book. The card is never valid for international air travel, not even to Canada.
Step 2
Consider the card as backup ID
It's a federally issued photo ID that satisfies REAL ID requirements for domestic flights, and it's much cheaper to replace than a book.
Step 3
Apply for both on one form
Check both boxes on the DS-11 or DS-82 and pay both product fees — you only pay the $35 execution fee once.
Step 4
Track their separate arrival
The book and card ship in different envelopes and can arrive days apart. Don't panic if only one shows up first.