One of the easiest ways to utilize feedback is to focus on “The Lean Startup” approach (read more about it here), but it involves three basic pillars: prototyping, experimenting and pivoting. By pushing out a product, getting feedback and then adapting before you push out the next product, you can constantly improve and make sure you stay relevant.
Now obviously, this is only an easy business to start if you live in a place that has something that tourists are going to be interested in. But the scope is wide; you don't need to live in a place chock-a-block with historical landmarks. While walking tours based on history are obvious candidates, don't forget about the natural wonders that we locals tend to take for granted. Guided nature tours, such as tidal pool tours or bird spotting tours can also be big winners with tourists.
I have another to add to your list that’s almost as easy to do as going for a daily walk! Clean up litter outside commercial properties for property management companies. The work is done on foot using simple hand tools. I started this as a side gig in 1981 and grew it into a profitable full-time business that I continue to operate today. I share my experience in my book, Cleanlots, and offer free support.
I’m not sure why you brought up the things you did. Your son in college has nothing to do with your present situation. Your dad passing shouldn’t mean anything in your success and survival. Your child at home is your singular issue. 4 years unemployed is impossible unless you’re living on an island. You worked your entire life? That’s like 20 years or so only, you quite possibly have another 40+ years left. You’re the one who is going to have to decide that the excuses are over and you need to either apply to jobs or start a business. Or enjoy the time with your child at home while on public assistance. But stay sharp and be ready! YOU ARE AN AMAZING WOMAN WHO IS CAPABLE OF ANYTHING YOU PUT YOUR MIND TO!
First off, I’m a blogger so it seems wrong not to mention it, but more importantly, it’s a legitimate way to make money. It’s quite possibly the least straight-forward way on this list, but it’s very doable and it’s also quite possibly the funnest way on this list. I love blogging and I know hundreds of bloggers who feel the same. So let’s talk about making money blogging and what it really means.

Teaching and tutoring English as a second language is a great way to make money online, not to mention open some doors for you to travel the world if you'd like. While full ESL (English as a Second Language) accreditation is recommended, as long as you’re a native speaker and have the ability to teach, there are people in countries such as Hong Kong or the UAE who are willing to pay upwards of $25/hr for you to tutor them English via Skype. Check out Indeed, Learn4Good and Remote.co for remote english tutoring jobs or sign up on a specialized site like VerbalPlanet or Chegg Tutors.
Today, if you're at all serious about succeeding in any endeavor, whether online or offline, you have to deliver enormous amounts of value. Yes, you have to do the most amount of work for the least initial return. This is especially true online. Why? Because it takes time to build authority and create an audience, two primary ingredients necessary to succeed in the wonderful world of commerce on the web.
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