Greeting Cards

How do you choose cards for people? Do you buy them at Wal-Mart, a party store, or a pharmacy? Do you use printable greeting cards? For me, it varies. I have gone to Wal-Mart quite often and I have also gone to a party store. When I've had ink in my printer I've printed off cards, but the best success for me has been cards from CVS and Walgreen.