11) Where the shoe pinches
The source of trouble, grief, stress, difficulty.
12) Meet halfway
To compromise with someone, often in an argument or disagreement.
13) Bear the brunt
To suffer the worst part of an unpleasant or problematic situation.
14) Weather the storm
Survive difficulties.
15) Hard and fast
Definite, fixed, invariable.
16) Leave in the lurch
Abandon or desert someone in difficult straits.
17) By and by
Pretty soon, ultimately, finally.
18) Hang up
Hold on, suspend.
19) From pillar to post
From place to place.
20) Below par
Below average.