If you're looking for good strategies on how to bet on one of the easiest sports to predict, check some of these out. I personally use SocaTrader. But I've checked them all out and they're all top notch.

Soccer Trading Strategies
SoccaTrader: Trading System

Shows how to easily select soccer teams to bet on
Cash in on Football

British Soccer tips
Most reliable betting source

These are asian betting soccer strategies. Interesting to learn since their different then most others
Asian Handicap Signals

The most popular betting system out there
SocaBet

For just gamblers, easy to use if you're just a casual better on soccer
Soccer Betting Systems

Millards Gambling. This is strategies for betting on soccer
Pro Strategies