Get a job, it can be entry level. Trade bitcoins or other virtual currencies, or even stocks and shares. Sell stuff you don't use anymore that might be of value. Look for jobs in your neighbourhood like dog walking, babysitting, house cleaning etc.
Aside from getting a job like the others have mentioned.
You can...
-Have a garage sale
-set up at the weekly flea market if you have one
-preform tricks for tips if you live near a busy area
-sell sperm/eggs
-sell blood/plasma
-sell snacks or bottled water
-mow lawns
-clean lots
-clean houses
-walk dogs
-paint someone's house
Yea, get a job ffs. I know it’s 2018 and we should all get everything for nothing but reality still says we need to have a job of some sorts to sustain our lifestyle