How many mail subscriptions for newsletters do you have and how many of those you read every time?
For me personal the Cool Tools newsletter is currently the one which I read most if it arrives once a week. This is what’s about:
Cool Tools is a web site which recommends the best/cheapest tools available. Tools are defined broadly as anything that can be useful. This includes hand tools, machines, books, software, gadgets, websites, maps, and even ideas. All reviews are positive raves written by real users. We don’t bother with negative reviews because our intent is to only offer the best. - About Cool Tools
The main reason I enjoy reading it, is that it gives me inspiration for “tools” that exists which I haven’t thought about and they might be interesting to try out or to use. One of the tools was a Bluetooth tracker just for almost anything. To help you find your things if you lose them.