If I needed cash in a hurry I'd probably do Instacart. I've browsed their subreddit - some shoppers are making $250-300 a day delivering groceries right now. If you can successfully cherry-pick those big Costco orders you'll typically get a $25-50 tip, in addition to delivery fees.
During this pandemic our household is ordering about $300-400 of Costco a week, since we're cooking everything at home, and tipping an Instacart delivery person $40-50 seems like a good tradeoff to avoid having to risk getting Covid-19 in a store.
Of course, the reason this is so high right now is that it is essentially hazard pay. You're putting yourself at risk of getting sick so others don't have to. Provided you are not high risk (<50 years old, no pre-existing health conditions) this might be an acceptable risk.
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2. Get a remote call centre job.
3. The DoorDashes and Uber Eats of the world are doing tremendous business right now, as is Amazon (and they have the Flex delivery service). Instacart was also hiring some 300,000 people.
4. If your friend is the creative or innovative type, there are a ton of competitions being hosted by various companies. You enter enough and the income can be somewhat reliable. This is my own personal niche.
5. Freelance writing. Even with the downturn, there seems to be a decent number of businesses with blogs wanting guest articles.