If you have an amazing idea but if you do not prepare professional business plan that has all the necessary essentials of business plan to propose, then Venture Capital investors will not invest.
Have a good team
Venture Capital investors know what the essentials of succeeding in startup are. Venture Capitals have an ultimate goal of selling the company when it is established. VC will evaluate their options between trade off and Initial Public Offering (IPO). A good team shows that this startup has a team that will deliver the goal of making the company established.
Presentation and persuasion
As the person who came up with idea and as a leader of the team you might or you might not have all the qualities of persuasion. If you have the experience and qualities in persuading then it is great but if you have a team member who has good skill in presentation and persuading then let him deliver the presentation. It shows that you are not the only one convinced with your idea.
Venture Capital investors knows which investments are dumb money, meaning that the invested money will not be used to increase the return. Make sure that your startup idea will generate high returns, and give them certain time line. Venture Capital investors have the goal to get high return with in 5 years so that they can sell the company short after 5 years.
Venture Capital investors knows which ideas are value adding and which ideas are more likely to get better offers. If you have an amazing idea then approach to more than one Venture Capital investors. Show them that you are not only after the money of Venture Capital investors but you are also looking for value adding Venture Capital Investors.