“Fast meditation”? A study posted at PsychCentral shows near-instant results from just a little mindfulness practice:
Psychologists studying the effects of a meditation technique known as “mindfulness” found that meditation-trained participants showed a significant improvement in their critical cognitive skills (and performed significantly higher in cognitive tests than a control group) after only four days of training for only 20 minutes each day.
If you’re curious, a good place to start: Jon Kabat-Zinn’s Wherever You Go, There You Are. A fast mindfulness read.