How do you do this?  Well, try to get the highest paying job you can!  Ask for a raise!  Utilize services, such as, to see how your salary competes with others in your same job.  Some companies really force employees to leave to get a raise, and then come back for another raise.   This industry jumping promotional strategy is very common and could work.
DonebyForty Yes, that makes total sense! I hear you on the savings rate, too. I always figured I lived lean enough (and had enough saved up) that I could handle things even without my main source of income. However, after leaving my job last year and having a tough time with freelancing, I realized not having a job was more of a mental drain than a money one. I like knowing I have control and can call on another source of income and increase it when I need to. 

Social Security — Depending upon your income, Social Security benefits might be entirely tax-free or partly taxable. Ex: If your income is more than $25,000 — or $32,000 if married filing jointly — up to 85% of your Social Security benefits is taxable. When figuring your income, include tax-free interest income and 50% of your Social Security benefits.
Being able to generate passive income largely depends on your audience, and if they detect that you care more about making money than serving them, you won’t succeed. “Whenever I’ve seen people do something just for the money, they’ve failed because their intentions aren’t driving them in the right direction. It should always be about helping people and about the passion of making others feel better. The byproduct of doing that is generating money,” says Flynn.

Even if each patron only contributes a very small amount each month, it can still be a huge source of income. Take a look at the Patreon page for Kinda Funny, an internet video company. They have over 6,209 patrons which means an average of just $3 a month would be a monthly income of almost $19,000 – plus they get cheerleaders that are always happy to spread the word on their brand.

And, let’s face it; not everyone wants to sling body wraps or nutrition shakes to their family and friends. That’s why offering a service is often one of the best, and least uncomfortable, ways to earn side income doing something you love. Maybe you want to clean houses or rake leaves or help people file their taxes. It’s totally up to you, and that’s the beauty of this option.