Where To Park Excess Cash

Parking Your Cash :-

Bank Fixed deposits/Post office deposits: Save money for months as you like. Minimum 6 months to 10 years
Savings Accounts: You can park your money. You will get less interest.
Current Account: Business people can park money.
Short Term Funds: Just like mutual funds. You can invest money for Short term(less than 365 days).
Company bonds: Usually you will get more interest on company bonds.
India Government Security Bonds: You can park your money for good interest and security.

details here

Based on India Banking System.