This allows to schedule reviews of org entries. Entries will be scheduled for review if their NEXT_REVIEW or their LAST_REVIEW property is set. The next review date is the NEXT_REVIEW date, if it is present, otherwise it is computed from the LAST_REVIEW property and the REVIEW_DELAY period, such as "+1m". If REVIEW_DELAY is absent, a default period is used. Note that the LAST_REVIEW property is not considered as inherited, but REVIEW_DELAY is, allowing to set it for whole subtrees. Checking of review dates is done through an agenda view, using the `org-review-agenda-skip' skipping function. This function is based on `org-review-toreview-p', that returns `nil' if no review is necessary (no review planned or it happened recently), otherwise it returns the date the review was first necessary (NEXT_REVIEW, or LAST_REVIEW + REVIEW_DELAY, if it is in the past). To mark an entry as reviewed, use the function `org-review-insert-last-review' to set the LAST_REVIEW date to the current date. If `org-review-sets-next-date' is set (which is the default), this function also computes the date of the next review and inserts it as NEXT_REVIEW. Example use. 1 - To display the things to review in the agenda. (setq org-agenda-custom-commands (quote ( ... ("R" "Review projects" tags-todo "-CANCELLED/" ((org-agenda-overriding-header "Reviews Scheduled") (org-agenda-skip-function 'org-review-agenda-skip) (org-agenda-cmp-user-defined 'org-review-compare) (org-agenda-sorting-strategy '(user-defined-down)))) ... ))) 2 - To set a key binding to review from the agenda (add-hook 'org-agenda-mode-hook (lambda () (local-set-key (kbd "C-c C-r") 'org-review-insert-last-review))) ; Changes 2016-08-18: better detection of org-agenda buffers 2014-05-08: added the ability to specify next review dates TODO - be able to specify a function to run when marking an item reviewed