I have read about passive income and it is a very attractive idea.
What is the best way to go about generating passive income here, what is the most viable option in Singapore? Any websites or blogs with proven techniques to recommend?
You need to be a bit careful here. More often than not, "passive income" is shorthand for "I'm about to try to recruit you into a Ponzi scheme".
"Passive income" should really only refer to things where you literally sit back and pocket the income stream. Investing in dividend stocks is "passive income". Investing in bonds is "passive income".
Trading stocks or options or FX or buttcoins or whatever is not "passive income" because you have to sit there and stress out about your positions and your risk management all day. Trust me on this: being a trader is stressful as hell. It will take years off your life.
Running an "internet marketing" business is not "passive income", it's "being an asshole". Investing in land-banking or an obvious Ponzi scheme is not "passive income", it's "being an idiot".
I'd even go so far as to say that renting out an apartment is not "passive income", because you still have to answer phone calls at two in the morning when the pipes are blocked and the toilet's overflowing.
So don't get seduced when you see the words "passive income". Most "passive income" schemes are either not really passive, completely dodgy, or both.