Perfection.
Inspiration.
Permission.
Reassurance.
Someone to change.
The right person to come along.
The kids to leave home.
A more favorable horoscope.
The new administration to take over.
An absence of risk.
Someone to discover you.
A clear set of instructions.
More self confidence.
The pain to go away.
Get on with it already!
(Stolen from Jack Canfield's book 'The Success Principles.')