diff --git a/rules.md b/rules.md
index 8ec8de4..c5b4f24 100644
--- a/rules.md
+++ b/rules.md
@@ -134,11 +134,11 @@ At certain points during the campaign, you will be presented with an obstacle or
 
 Unless otherwise stated, add the current level of that skill to your roll - on a success, you succeed in overcoming whatever task you were attempting; on a failure, you lose either one point of Stamina, or one point from that skill's linked attribute. You cannot use a skill if the linked attribute has been reduced to 0.
 
-When you fail a Skill Challenge, you may choose to "exert" yourself by spending one point of Stamina to re-roll that attempt; if you do, you must take the new result. If your Stamina ever reaches 0, you become [Fatigued](#resting-and-fatigue).
+When you fail a Skill Challenge, you may choose to "exert" yourself once by spending one point of Stamina to re-roll that attempt; if you do, you must take the new result. If your Stamina ever reaches 0, you become [Fatigued](#resting-and-fatigue).
 
-**TOD**: missing link
+**TODO**: missing link
 
-**TODO** Continue here - pulling from and revising [draft-fragments.txt](draft-fragments.txt)
+**TODO**: Continue here - pulling from and revising [draft-fragments.txt](draft-fragments.txt)