If you’re one of those people who has one of those slightly prissy ‘NO JUNK MAIL’ signs pasted above your letterbox (or ‘No Unsolicited Mail’ if you live in  a middle-class area), please look away now. In fact, you may want to go lie down in a darkened room and do some breathing exercises. I know how much this subject matter can be very upsetting to some. However, if you are somewhat more forgiving and entrepreneurially open-minded then here’s something that you could make a very tidy income from.

As far as I know, no one is doing this in the UK yet. Over in the USA a guy called Stephen Shulenski is making $500 a day (that’s about £350) doing just this. I can’t think of a reason in the world why it wouldn’t  work the same or even better here.

I discovered this opportunity by chance, while browsing in a local card shop. It’s already a very profitable opportunity for someone. It would be very easy to duplicate it in your area...

Train and plane spotting is a bit of an odd hobby, don’t you think? Standing for hours in the rain at a station or airport hoping for a glimpse of a National Express Class 91 locomotive or a British Airways Boeing 747-400 with winglets. To be honest, one train looks much the same as another to me, although apparently they’re not.

But don’t knock it, because it can be a great niche market for digital photographers. Train and plane spotters are always keen to buy photos of a particular train or aircraft to add to their collection. In fact, I’ve discovered that good photos will sell for £2, £3 or even £10 a pop...  and some particularly sought after photos have sold thousands of copies. The Internet makes it easy to take and sell train and aircraft photos to enthusiasts.