What kind of "Grave Goods" will future anthropologists/archeologists find in our present day cemeteries?

Yesterday evening I was reading articles on various digs and was struck by some of the artifacts that are found in old grave sites; things like thumb rings that were associated with archers, pottery both personal and ceremonial, tools or weaponry of the trade and, of course, jewelry of all kinds. These items are often personal items and many times they use these goods to assist in determining the social status, sex and age of the burial.

What kind of things are people buried with? Is it more common to bury someone in their finest clothes bought for the occasion or that they already owned? What about burial in their favorite clothes even if they are not dressy? How common is it to place personal items into coffins prior to burial at this time? What kind of things are placed in coffins these days? Have you done so yourself?