• On Sign Up and Invite a Friend, start in Name text box.
• On New card page, start in "card name" box (or if it's pre-populated, content text box).
• In card name editor, start with current name in card name text box selected.
• In card type editor, start with menu of types already open (as if you had clicked on it).
• When editing a card, start in the "right" place for its type:
  • Rich/PlainText/Phrase/Number/Currency/Percentage in the text box
  • Pointers in multiselect: picker control is active; list: cursor in the first text box (and whenever you click "add card" put the cursor in the newly created text box)
  • Date with pop up editor open and set to... the current date?
  • ...and in multi-edit, start in the "right" place of the first inclusion.
• more?

Also see place cursor where you double-clicked.

These are based on features that no longer exist, but may again:

• When connecting to another card, start in the text box where you put the name of the card you're connecting to.
• In link editor, start in the "reads as" text box (and if possible restrict tabbing to moving between the two text boxes in the editor).