One good idea for a long seems to be US treasury products, which historically have faired well in times of fear and panic. In particular, take a look at this which tracks the US ten year treasury note. Observe the steadily rising lows and the roughly consistent level the highs have maintained at $78.00, a nice round number at that.
Further, note the support from below via the indicating that a 'bounce' or retracement may be in order from the recent momentum of the past week. The confirms its a great time to get in, though admittedly, the still suggests a bit of momentum. I'd set a stop loss at either $73.75, or $72.50, both recent lows and psychologically sound, round numbers.