It’s been a while since I wrote a blog post on my personal website. I wanted to write a blog post reflecting on my PhD journey after successfully defending my PhD in February 2025. I think it’s now the time to share my advice with prospective PhD students. Initially, I was thinking about giving people some general advice on how to complete a PhD with successful results and a happy outcome. However, I decided to offer two essential pieces of advice to people, which can potentially help them not only during their PhD journey but also after graduation, when the serious part of the game begins. Now, my main reason is that AI chatbots like ChatGPT can provide people with general advice on “How to Do a PhD.” So, I don’t want to repeat what an AI agent can tell you.