How to design a Small Garden - what plants really work?

Read more on our series 'How to Design a Garden if...' at  PlantPlots.com
We really try to make gardening easier, and this podcast is one on our series of how hot design a garden if...
Small gardens have their own unique set of issues and design problems to overcome. But what about the plants for a small garden, what type of plant should you think about including and which ones should never be planted?