Very well thought out, and excellently written. Although I may not agree with all of these tips, most of what's in here is pure gold.

As a beginner GM I really recommend this well written list of very detailed tips. It's not the first book I read about GMing, but you really can get a lot out of these few pages, which makes the price (1$) a bargain. Only problem: there is no printerfriendly textversion available, so printing will cost you some more ink. But considering the price, 5 stars is a well deserved rating.