I like to writing about good cameras prolonged they have good value to take with it. And an IP surveillance camera, if it can be a well made, finely tuned component of equipment, is about as useful as can be. You can't put a precise valuation on safety and security. Especially as well as yours. Too much is wasteful--but not enough is just indefensible.
If you are offering a workshop, coaching/consulting, possibly a software solution, and you want to instantly add value to your clients, create a "client/student resource page" any blog. This becomes a breeding ground that the students can play in, study more, and soak the materials. Prospects continue to benefit from your expertise despite the fact that you're not physically there