These days I rarely spend any money on magazines even though there are a couple magazines I still read on a regular basis. With the current economic environment, it is definitely a good idea to keep up with the economic policies. Two of the magazines that I really like are Business Week and Economist. RewardGold is currently offering a one year subscription to Business Week.
Personally I like Economist better as they give a global view and the impact of trades between different nations. However, I rarely see free magazine deals from them, but instead use free airline mileage to redeem Economist subscription