In some states, you can get 5 or 10 cents per can or bottle by returning them to a deposit center. There are many ways to take advantage of this opportunity:  Scrounge up all of the cans and bottles you can find around your home. Look for cans and bottles in trash cans, along busy roads, and anywhere that people hang out (parks, stadiums, etc.). If you've got a big pile of scrap in your backyard, own a junked camper or other vehicle, or know of a dump site where you can legally salvage materials, you can sort and sell it to a scrap yard or recycling center in your area. Metals such as scrap steel, copper, or aluminum can fetch good prices. If your state doesn’t have a can/bottle refund system, you can still sell aluminum cans to a scrap yard. Computers are full of valuable metals such as steel, aluminum, and gold. If you dismantle old computers, you can sort these metals and sell them to a salvage yard, or you may be able to find buyers who will accept the old computer as is and scrap it themselves.  If possible, get several computers to scrap to make it worth your while. For instance, offer to take outdated computers from a school doing upgrades or find junked computers. Don’t scrap good, working computers; what you get for the scrap won’t be as much as you could get by selling the components or the entire device.

TL;DR in Indonesian:
Tukar botol dan kaleng untuk mendapatkan uang. Bongkar tumpukan sampah. Bongkar komputer tak terpakai.