If you work fulltime you need to leave a good two to three months to prepare. Get up to speed on everything you need to know eg if you work in tech you might need to get flat on the following: coding, machine learning, and system design. Executive Agents can help you with this.
Get your knowledge and problem-solving skills up to speed.
Remain curious in your research and preparation. Continuous learning is key.
Do you know if there will be technical problem-solving questions? If not, find out. The only way to effectively prepare for such questions is to practice, practice, practice.
In your preparation, maintain your curiosity and modesty. Let your mind be a sponge for knowledge and information.