Best way to invest money...risks doesnt matter for me?

It's been mathematically "proven" that you can get high returns AND reduce your risk by buying diverse high-risk investments which have no correllation.

Also, Equities (Stocks) have had some of the best returns historically, and are still considered a very good investment.

Of course you don't want to be STUPID about it and buy the riskiest stuff possible. Get some AGGRESSIVE mutual funds with low fees (Vanguard has some). Spread your money around to highly aggressive funds that have little correllation. For instance, some Domestic High Growth, some Foreign aggressive growth, maybe some Real Estate Trust Funds, some High Tech, Some Health Care.

Look at the historic returns of the sector and the fund. Look too at the risk vs. return. If, as you say, risks don't matter, then go for high return funds, with a reasonable risk. And spread it around - but make sure you spread it around to different TYPES of investments - all that are aggressive, but some that move contrary to each other (like foreign vs domestic, or REITs vs Stock)

Buying shares of a company would be a good bet if you have the time for it. otherwise Mutual funds especially using SIP would be a best in terms of returs. Choose the one with a higher equity component. Among the best are Frankling India Prima Fund and Frankin India Prima Plus