With Canon cartridges, you just press and hold the "Stop/Reset" button for five seconds when it says you're out of ink. You need to be sure to remove the cartridge when it's actually empty, otherwise it could damage your printer. Also, don't run maintenance when a cartridge is empty. Once you replace it, the printer will begin monitoring ink levels again.
What do you do when you see homeless people? My policy is to give what I have in my pocket. Here is a brilliant idea. Keep some Helping Bags in the car to give to someone in need. Fill a ziplock bag with lip balm, tissues, toothbrush and toothpaste, comb, soap, trail mix, granola bars, crackers, pack of gum, band aids, coins, hand wipes, a warm pair of socks, maybe a Starbucks gift card
The five-dollar savings plan: Every time you find yourself with a five-dollar bill in your possession, you set it aside instead of spending it. At the end of the year, you use the money you've saved for either a big purchase or to do something you wouldn't normally spend the money to do.
First Time Home Buyers: The Path to Home Ownership