How to Get Rich by Felix Dennis was recommended to me by an adviser that I trust. Since I grew up in my career in high tech at the same time as Mr. Dennis built his fortune I could relate to everything he explained about how his success with the first computer trade pubs and Maxim produced his rise to the ranks of the rich (and somewhat famous). This is a somewhat gritty tale told from a heavy British viewpoint but is nonetheless an accurate description of what's needed to become rich. I didn't say successful or happy, because these have nothing to do with getting rich as you will hear from Felix throughout.
You could try advertising more, for example, by putting up signs around the neighborhood, posting about it on social media, or having people you know spread the word. You could also try doing it in a different neighborhood that might have friendlier people, or do it in a time and place where there's likely to be a lot of people walking around the area (e.g., near a church before the end of a mass).
Remember the steps from point 2: Make more money, spend less, and invest wisely. Point 3 covered making more money, and this one covers spending less. Make a detailed budget for yourself based on your projected income and your current expenses. Set firm limits for your expenses, and keep a close eye on where most of your money goes--you might be surprised at some of the areas where you waste the most money. Once identified, you can start refining your budget to spend as little as possible, and funnel the rest into a savings or investment program.
People are always looking to have their cars washed and detailed. You could be a mobile car washer and detailer without having a permanent location. Reach out to people you know or make some flyers and put it in your neighbors' mailboxes. If you want to get serious about it, prop up a one-page website or give out business cards. You can make money quickly doing this.