I like sending snail mail. This Emacs Lisp snippet displays all the contacts for whom I have addresses, sorted according to country. This makes it easy for me to, say, jump to all the USA contacts whom I should mail before heading back over the border.
(defun sacha/bbdb-filter-records-for-address (records) "Filter records for addresses." (sort (delq nil (mapcar (lambda (rec) (and (bbdb-record-addresses rec) rec)) records)) (lambda (a b) (string< (bbdb-address-country (car (bbdb-record-addresses a))) (bbdb-address-country (car (bbdb-record-addresses b))))))) ;; Do the actual work here (bbdb-display-records (sacha/bbdb-filter-records-for-address (bbdb-records)))