If you make yourself a perfectly healthy shrimp pasta dish, and put it in the fridge and ordered bean burritos...you might be depressed.
If you got dressed to go to the gym (thus saving the need to work out and shower) and are sitting around in a wrinkled tshirt slugging diet coke and writing in a blog instead...you might be depressed.
If you sleep through your meds that are supposed to relieve depression...you might be depressed.
If crying, throwing up and removing contact lenses are activities that all seem viable yet require hours worth of thought...you might be depressed.
If you had nightmare about your involvement in an Extreme Sport that involved ski-jumping down a rickety, home-made nearly vertical ramp, and feel compelled to blog about it...you might just be a loser.