There re a few basic things you need to do in order to keep your account away from hackers, and these basic steps are mandatory for every new and existing account on Facebook.
Use A Strong Password:
The first thing you need to secure your account is to select a strong password which must contains lower and capital letters as well as numbers and special characters, Dont use the common pasword like india456,prince888
Use strong password like Ja55%$# ,
Add Your Mobile Number:
Put your mobile number on facebook profile if sometime you lost your password .you can easily recover your account.
Go to setting and then left side click on mobile and add you mobile number.