Advice
This is the noun form, which according to Dictionary.com means an opinion or recommendation offered as a guide to action. Example:
My father always give me good advice.
Following my neighbor's advice, I cleaned up my surroundings to get rid of dengue-carrying mosquitoes.
Advise
This is the verb from, which according to Dictionary.com means to give counsel to, offer an opinion or recommendation or suggestion worth following. Example:
The doctor advised him against eating too much chocolates.
My parents advised us when they would be arriving.
