Avoid brainstorm sessions:
The most common mistake people make is to lose spontaneity. Brainstorming does not mean to spare some time, sit quietly and then start thinking about new business proposals. An idea can hit your mind anytime and anywhere. All you need to do is to stay focused. Take this as a fun activity; think creatively and ultimately this will help in letting the creative juices flow.
Consider your hobbies:
Another method to get a valid business idea is to think while keeping your hobbies in mind. You should find out what you enjoy to do and then start thinking about some business that is close to your hobby in nature. For instance, if you like adventures then consider tour operating, travel agency or hotel industry.
Listen to others:
Do not confine this process to yourself rather include others in brainstorming. Almost everyone has a business idea in mind so you can get a long list of valid ideas through this technique. However, make sure that you are not wasting time in consulting too many people. Listen only to those who have some experience and knowledge.
Make a list and then shortlist:
You should not talk down the importance of the internet, books and other sources of information. Do extensive research, know recent trends and then make a list of the ideas that come into your mind. After completing this list, pick three or four ideas and start evaluating the possibilities of success.
Pick one and do some research:
In the end, you should go for the best one and start working on it. Know the start-up cost, determine the target audience, make a business plan and show it to some experienced and knowledgeable person.