The good news is that once you get started, it becomes easier to find more opportunities. Many of these companies add you to their database so they can invite you to more studies when they become available. Of course, you always have the right to accept or deny any invitation. You are never required to participate in any study that you don’t want to.
One of the quickest and easiest ways to make money online is to do surveys. You can use sites and apps like Swagbucks, Survey Junkie, or Opinion Outpost to fill out questionnaires and get paid in cash or other rewards, like gift cards. However, it can take a while to find a survey that’s a good match for you, and you may need to make a certain amount before you can get your payout.
Begin to kill the flesh crawlers. After awhile, you'll notice that they are dropping tons of herbs, runes, ores and very rarely they drop uncut sapphires and diamonds which are worth quite a bit. Pick up all fire runes, all nature runes and only the ranarrs, kwuarm, and other high leveled herbs (if you have the herblore level to do so, you can pick up the lower level herbs to clean them for the exp then drop them). After you have over 2000 fires runes and 75 nature runes, you should have a full inventory of herbs.
Donating plasma can actually work out better than selling your blood. It takes longer to donate plasma because they will put your red blood cells back in your system. The upside is that you can donate plasma as much as twice a week and you can make anywhere from $40-$60 per donation. You can make that $100 in less than a week if you can stomach the needle.
If you are aware of more, please let me know so I can get them added to this list. And if you don't mind occasionally having to take phone calls, several of the companies on this list will (as described above) hire you to handle calls, emails, and incoming chats. Just read the job descriptions carefully before you apply to verify that answering emails would be part of what you do.
Become a dog walker if you live in an area where they are in demand. You can walk dogs for people who own dogs but who are too busy to walk them. However, this can be a demanding job, especially if you end up walking a few dogs at once or if you are walking dogs throughout the day, so ensure that you have the physical stamina for this type of job.