I am still thinking that renting out a property is probably the best form of passive income that I could have. However, I do not have the money to put down on a property and have done calculations with regards to doing it with a mortgage and feel that it is too much of a risk for us to take at the moment. Especially as it would only make a small profit and with interest rates likely to go up in the next few years, it could get expensive. I would ideally like to buy a property outright to rent out rather than using a mortgage, so that idea will have to wait.
I feel that writing more books could be the way to go, although this does not bring in a fortune. Perhaps promoting the ones I have could help, but I am not sure of many free ways to do this. I am always surprised at how well sales do without any promotion from me, but obviously promotion would help. It is something that I plan to think about when I get some spare time.