I am totally lol-ing at your posts, orange, as that's how I started off! Not the raisin - "mindfulness" hadn't been invented yet - but all the hate sharing, hate woo, where's the bloody point, get on with it you load of pretentious wankers! (Haha, I just had to add wanker to my spellcheck.)
You wouldn't bloody recognise me now. Not only am I more insightful, wiser, and significantly more laid back, but I haven't raged or lost my temper once in 12 years and am no longer late for everything. I don't get into a frenzy about looking awful. I've got a loooong way to go yet, but I am bloody going there, believe me 
Everything about your intolerance, impatience and judgementalism is what causes your depression. Trying to summarise it quickly, you're fixated on doing things in certain ways; having certain attitudes, which aren't working right for you. When they don't work right for you, you judge yourself by those same standards and it all goes round in an extremely depressing circle.
Mindfulness is meditation lite. It teaches you that it's not necessary to act on your emotions. It's okay to have the emotions, feel what they feel like and even ponder on what gave rise to them. But, fuck it, they're just emotions. They come and go. That's what they're for. So we learn to let 'em do that. It's quite astonishingly easy when you've found it out.
Btw, I didn't have to stare at raisins, but I was sent on walks where I had to choose a leaf or something to examine. I also had to hug trees - think yourself lucky! I must have got quite the reputation around Tooting Common.
The sharing is so you get to see how amazingly different the insides of everybody's minds are. That kind of knocks the judgementalism on the head :)