Lately, I haven't been working a whole lot. It's definitely a big difference as to when I was accepting all the shifts I could take and be working well over 40 hours per week. I've been making extra money in several little ways, and they are working for now. I am glad that I get to enjoy my summer though and get to do a lot of small travel getaways!
My sister is the queen of side hustles and is always making extra money. I definitely want to diversify my income so that I'm not as reliant on one thing.
I'm going to guess that you have TONS of things in your closet/home that you can sell. Go through it and sell it! You can bring your stuff into a local thrift store such as Plato's Closet, sell it yourself on eBay, have a garage sale, list your items on Craigslist and more.
You'll probably make the most money on eBay (depending on your items), but it is also the most work, and there are fees. Craigslist has no fees, but it can be more dangerous and you will have to weed through a lot of spam replies to your posting. A garage sale won't earn you a whole lot per item, but if you sell a lot of stuff then it might be worthwhile to have a garage sale. Plato's Closet is probably the easiest thing to do, but you don't receive as much.
Many people babysit. The money can be good and it can be fun also! My sister was only 14 when she babysat full-time and made $10 an hour. It was also in our neighborhood so she could just walk to their house.
I make a little bit of money each month by writing online, and it is nice since writing is fun. Writing online can be hard to get into though, as you either need to know someone (such as Michelle), or you have to start from the bottom up. You will probably have to work for free in the beginning.
I have never done any mystery shopping, but I do know of people who do this. I have heard of people making very little money (such as a couple of dollars per week) and some who make thousands per month. Some only work in order to get free items, whereas some actually make money off their mystery shopping. In order to make a living wage off of mystery shopping, I'm going to assume that you need to do a lot of mystery shops. The surveys that you take can also be very tedious.
If you calculate the amount of money per hour, it might be very low and not worth your time. It's up to you and what you can find of value for your time!