It's hard to tell how many calories something has just by looking at it. We already know what an ounce of nuts looks like - but what do servings of other common foods look like? Wisegeek took pictures of 200 calories portions of 71 common food items, including everything from staples like flour, cornmeal, oil and butter to muffins, ketchup, bacon, Powerbars and Tootsie Pops. They every carefully cut down the items that were more than 200 calories per piece to provide the most accurate visual example possible. Measurements are given in grams or milliliters, as well as calories. And as an additional bonus, every item was shot on the same plate, bowl or glass, so the size of each item can easily be compared to its neighboring items.

Now, calories aren't the only thing to take into consideration when planning your diet, but it is still nice to see that one glazed donut doesn't have quite as many calories as a bakery muffin or a bagel because it makes it that much easier to enjoy every once in a while.

These unusual ceramic plates have a couple of different uses and are so visually interesting that it's almost a surprise that they're not in any high-end restaurants, especially one where they deal with less traditional foods and presentations. The Dish It Up dishes come in three sizes that can be fit together along their "cut" edge. They could be used for portion control, if you're looking for a practical purpose to justify buying them and more artistic platings are not your goal. One other interesting feature of the dishes is that they can be stored vertically, resting on their straight edge, which minimizes the amount of cabinet space they take up. They are sold in sets that include one each of the small, medium and large sizes.

In the NY Times last week, professor Brian Wansink talked about some of his research on how people have relatively little concept of what they're eating and usually take visual cues from outside sources, rather than from their own bodies about fullness. He mentioned a test that involved giving participants stale and fresh popcorn in different-sized containers that showed people would eat more from the larger container - even if that was the stale popcorn. That is not the only experiment that he and his colleagues did to support their position, however. They have a whole repertoire of experiments that demonstrate the same results. The tests answered these questions:

• Do even educated eaters fall prey to mindless eating based on container size?
• Does a food or a wine label affect how people feel about their meal and how much they eat?
• How hard is it to correctly estimate portion size based on container size, and how can the shape of a container make you consume more?
• Does how food is described change consumption rates?
• Do visual clues help slow down mindless snacking?

The answer is "yes" to each of these questions and they way they got to that answer in each case was interesting. Re-naming peas as "power peas" got kids to eat more. Educated eaters still binged when given oversized bowls and color-coding chips so people could see exactly how much they were eating helped them to eat less. The tests don't necessarily tell us anything new, but it's always interesting to see how people react in these different situations anyway. In fact, it's sort of tempting to try them out on coworkers in the break room or, if you have a child that needs to do a science project, questions like these could be a good starting point.

When it comes to food, just as with everything else, there are fads. These fads are subsets of long-lasting, broader trends that really shape the way we eat. For example, the lo-carb craze of a few years ago was part of a general weight-loss trend, which also covered a whole group of various "fad" diets. That trend slowly turned into one of the new top trends: healthy eating.

Since we're talking about food every day here, it's interested to take a step back and look at the broad categories that so shape how we think about food on a daily basis. As of now, the top trends in food processing, along with a few of their "trendlets," are:

1. Organics: This includes an increased interest in how foods are handled and produced. Growing concern for the environment and for how GMO foods impact us leads to consumers seeking out and valuing "natural" foods, local/regional goods and those produced with sustainable and fair trade policies.

Out of all the food trends we heard about back in December and January, there was one that is clearly becoming a big deal on th packaged food scene: miniature packaging, aka 100-calorie packs. "100 calories!" seems to be the hot new slogan on food products these days. The past three years have seen the market for portion-controlled packets go from 0 to more than 25 different foods. USA Today reports that 18 of the new products were introduced in 2005 alone. With more coming along this year, there is no indication that this trend is slowing.

Some of the newer products include 100-calorie sodas from brands like Coca-Cola, Pepsi and Shasta. These sodas have a mere 8-ounces per can, fewer than the more standard 12-ounces, and are marketed as being more portable than their full-sized counterparts. Coco-Cola says that they're marketed at consumers who wish to "improve their snacking and drinking opportunities."

In America, bigger is always seen as better. This is perfectly exemplified by the food industry, where simply getting a taco at an establishment might mean loosening your belt buckle a few notches. It always seems like fast food enterprises are trying to outdo each other--either through quantity or eye candy. I found a very hilarious short video that truly exemplifies the banal side of restaurant portions. I really couldn't stop laughing at this one.