I've been trading the triple short SPX ETF:SPXU and grabbing handfuls most days lately. Good practise to stay sharp. It's been working well with great liquidity and nice movements most of the time for easy trading. Even today with the big rally I made a few bucks on the short side buying at major resistance. And the market never did sell off so I bailed with enough profit for a nice lunch.
Here is the Weekly Nat Gas continuous contract. Still a sick puppy with no sign of life yet from what I can see.