SMN shorts basic material stocks; it trades opposite of the DOW jones. At 19.50/shares, it's a buy. You can even write calls against it for further protection. I recommend strike 20, either May or June. The latter has a juicier premium.
SRS shorts realestate. The ETF has been beatenseverely in the past 2 months, downfrom 60/share. At 19.70/share, it's worth a swing trade to 25.
SSG shorts semiconductor. I use this ETF to hedge my INTC, and DELL shares.