Note: Nearly all of these programs require an upfront investment for purchasing your initial inventory. They’re not our first choice when it comes to work from home jobs for this reason alone. We don’t like seeing users getting stuck with thousands of dollars in inventory only to realize they’re trying to offload their LuLaRoe into already saturated markets.
Two thoughts come to mind. First, at 27 you have a whole life in front of you, so whatever you do will be right if it is directed correctly. Second, pick a goal and work towards it (e.g., pay off medical debt; or pay off condo mortgage). Always remember, as you succeed in any one of these, then you can broaden out into other investments opportunities (e.g., stocks, mutual funds, real estates, etc.). The choice and timing are yours to call. My basic point; however, is while you are young “focus” on a GOAL and go after the goal aggressively.
Selling blood….there are very few companies that buy your blood. #1 reason being MANY people willing to sell their blood are not the type of people you want to receive their blood, ie drug addicts (not everyone). And if you can find a company willing to buy your blood you can only give it every 56 days (for whole bood). The most common blood product that is bought is plasma and you can only do that every 28 days (in New York state …which won’t buy blood anyways).
Social networks are a hot spot for work-at-home danger. One company called Easy Tweet Profits claims you can make up to $873/day online. They even claim one person earned $400,000/year using their method of tweeting your way to success. The catch? By signing up for their program you agree to be charged just under $50 per month! There are a whole host of other companies with similar names (usually involving “make money” or “make profits”) that suggest social networking can be a cash cow. But their game is all the same: Whether you’re talking about something you see on Craigslist, eBay, Facebook, Twitter or whatever’s the next hot thing, you’ve got to be wary.
Don't put all your trust in Social Security. While it's a good bet that Social Security will continue to work for the next 20 or so years, some data suggest that if Congress doesn't radically alter the system — either by raising taxes or reducing benefits — Social Security won't be available in its current form. It is probable, however, that Congress will act to "fix" Social Security. In any event, Social Security was never designed to be the only resource for retirees in their later years. That makes it all the more important that you save and invest for the future. 
Whether it’s an important consumer application, a specialist app to solve a particular niche problem, or even a time-wasting game you can play on your phone, you can create a massively successful business if you build software that helps people. (Look at the rise of Slack—the team communication software that went from side project to billion-dollar company in just 2 years.)
Successful investors take the time to study key financial concepts, learn the dos and don’ts and stay abreast of current trends. They take advantage of opportunities to strengthen and expand their understanding and expose themselves to financial information on a daily basis. Take a cue from them and subscribe to The Wall Street Journal, watch CNBC, pick up a financial magazine instead of a gossip magazine and follow financial experts on Twitter. Become a devoted student of money, and you can master the science of getting rich.
Now, it’s time to start creating and uploading content. Make sure you’re using a high-enough quality camera (most smartphones will work but I’d suggest at least having a tripod so your footage isn’t shaky), but don’t worry about being perfect at first. The beauty of YouTube is that you can continue to test out different content and styles as you find what works for you. Instead, stick to a regular schedule to build up your subscriber base.