Read cracking the coding interview and solve every single problem in it. Then start with the leetcode.com problems and solve every single one. Hen do 5 practi

Read cracking the coding interview and solve every single problem in it. Then start with the leetcode.com problems and solve every single one. Hen do 5 practice interviews with companies that you don't care about. That's all. It's simple but it takes determination and time to do.