Good timing for this thread as I'm always thinking of something to do on the side but most times it's just 'wantrepreneurship' in me that does the day dreaming. I've got the time for now, and always thought about an ecommerce site but always stuck at the step of 'what do I sell?'. Obviously finding a market isn't that difficult if there's a ton of stores for stuff there's a market to keep them all busy. I have a small investment property which is cash flow positive but that money is not touched by me until needed.
Outside of that some side gigs with dad (painting, floors, cabinets, etc.) brings in fairly good money. I think last year we hit around 10k or so just cause we were lucky and at the right time right place kind of thing. We don't go for more as we are both full time employed so strictly evenings/weekends. I'm sure if I pushed more for it the return would be nicer.
I'd definitely like to do more though, nothing wrong with having additional streams of income. And it's shocking what people will buy! I see moms selling little trinkets online for a few bucks but I'm sure they're making some sort of $ on it...otherwise what's the point. I'd recommend ecommerce and set up as a drop shipper so you don't deal with inventory...and the shipping will be taken care of by someone else. Check out 'reddit/entrepreneur' for some ideas...always an interesting read there. Looking forward to seeing more responses here.