It's good advice to try and focus on doing the things that bring you the greatest return on your efforts - so it is good to spend LESS time with email in general BUT that doesn't mean you should cut yourself off from what is going on and get OFF of email lists.I have long heard people give advice to opt out of all newsletter and email lists and for me - it's not good advice. People who are informed and knowledgeable are more likely to succeed. The more you know - the more opportunity there is.
Personally I feel if you are serious about what you do and want to be an expert in your industry you need to absorb everything you can and be aware of as much as possible if it relates to what you do to make a living.
I personally try to get on almost every list I can (if it's in my industry) so I can keep up and be aware of what other people in my industry are doing.
If I get spammed or INSULTED by what someone sends me I will OPT OUT for sure. But even then I learn a valuable lesson and am reminded what NOT to do to people on my lists - so it was worth opting in.
I also use FILTERS in gmail and for the most part only get exposed to important stuff UNLESS I go digging into my folders.
I try to NOT waste too much time reading email UNLESS I am looking for something or want to see what people in my biz are doing.
If you use FILTERS properly you can sign up to as much as you want.
I'm not suggesting you waste time or follow many different peoples advice or training - but I do think you'll be well served by keeping on top of what is going on in marketing and occasionally reading the emails being sent out there - especially if you have web sites that try to sell things.
Now before you try to set me straight - remember I am the guy that brought you the whole over-analysis paralysis discussion over 5 years ago along the phrase information overload and all that stuff.http://www.mikeliebner.com/internet-mar ... formation/
I still believe that - but - for me - I would rather KNOW what is going on if it relates to my business.
Newsletters are free and often give a great insight to trends in our business.
I suggest you learn to FILTER better rather than OPT OUT