1. Better relationships - with your colleagues,
friends or family, or with your partner (unless
you're admitting to infidelity - see links
further down for other articles)
2. A clear conscience , which potentially
reduces anxiety, improves sleep and restores
your self-respect
3. Improved 'spare capacity' to deal with other
dramas, projects, people or opportunities.
Worrying about being found out to have done
something wrong, and guilt about having
caused hurt, takes energy that you can put to
much better use
4. It builds trust
5 It prevents a potential deterioration of
relationship problems
6. It can kick start a renewal of your
relationship
7. It removes awkwardness between the parties
- you know... that horrible feeling of not
knowing what to say to the other person,
resulting in you doing all you can to avoid
them
8. In an indirect way it opens up a way for your
partner to admit to their mistakes
9. It allows your partner to love you with all
your flaws and imperfections
10.it helps you avoid making unnecessary enemies.
http://www.professional-counselling.com/how-to-say-sorry.html