Level 30-60: Cut Willow logs. Willow logs are fast exp, but their locations aren't normally quiet. You won't make much money with these trees, but enough to buy a Rune Hatchet (requires 41 Woodcutting). You can get magic seeds worth up to 150,000gp from birds nests here. Skip cutting down maples. These become available at level 45, but they are slow to cut down and not as good money per hour as willows.
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).
yes you are right, but many customers require a sample of their work … Because there is a lot of competition on the market, that’s why the level without much varied, I took care of creating logos on T-shirts. Later, posters, logos on the site, and bo creating graphics for comics and games. However, it lasted several years. But I recommend looking for work everywhere, even for pennies because every work done is experience.
Become a babysitter if you are good with children. There are websites that will connect you with people who need a babysitter. To get hired by people who do not know you, it will help to pass a CPR class, or to have a special talent or expertise for entertaining children. However, you might be able to make money more quickly just by babysitting for people you know, or by having friends refer you to others who need a babysitter.