Learn the following idioms. They are very popular and often used in current usage. They are indispensable for social intercourse. Let these be a part and parcel of your speech and writing. These idioms will enrich your vocabulary. Read them again and again till you master them. Idioms add spice to your speech and give you more confidence. You can express yourself better if you are familiar with them.
For example :-
1. At one's wit's end ===> The question was very difficult and I was at my wit's end.
2. A chicken hearted fellow ===> A chicken hearted fellow cannot be a good soldier.