according to Hoyle
In keeping with established rules; on the highest authority, as In The tax records are in excellent order, all according to Hoyle.
sweetness and light
Ostentatious amiability and friendliness, as in One day she has a temper tantrum, the next day she's all sweetness and light.
bottom of the ladder
Lowest or most junior position in a hierarchy. For example, If we hire you, you'll have to begin at the bottom of the ladder.
at the drop of a hat
Immediately, without delay, as in We were ready to pack our bags and go on vacation at the drop of a hat.
augur well for
Also, augur ill for; bode well or ill for.
Have good (or bad) expectations for someone or something. For example, John's recovery from surgery augurs well for the team and The Republican victory in the Congressional elections bodes ill for affirmative action.