If you use Org mode extensively, you may end up enough TODO items that it starts to make sense to prioritize them. Prioritizing can be done by placing a priority cookie into the headline of a TODO item, like this
*** TODO [#A] Write letter to Sam Fortune
By default, Org mode supports three priorities: ‘A’, ‘B’, and ‘C’. ‘A’ is the highest priority. An entry without a cookie is treated as priority ‘B’. Priorities make a difference only in the agenda (see Weekly/daily agenda); outside the agenda, they have no inherent meaning to Org mode.
Priorities can be attached to any outline tree entries; they do not need to be TODO items.
shift-selection-mode.
You can change the range of allowed priorities by setting the variables
org-highest-priority, org-lowest-priority, and
org-default-priority. For an individual buffer, you may set
these values (highest, lowest, default) like this (please make sure that
the highest priority is earlier in the alphabet than the lowest
priority):
#+PRIORITIES: A C B