Huy: Finding a good topic is nothing that happens over night (well, usually not!).
I recommend:
- Don't rush. Plan at least 3 months for finding a topic!
- Do excessive (!) research on all ideas that you come up with. Make notes of every weird idea in your head.
- Focus in particular on latest articles (1-2 years), and understand the idea and the outlook! The outlook gives you new ideas, usually.
- Don't intermix researching for articles, reading them and taking notes - those are three separate tasks!
- Read, read, read. :-)
- And read this famous article: http://www.cell.com/molecular-cell/abstract/S1097-2765%2809%2900641-8
Best, Sebastian.