There are sector ETFs for sectors of the major indices, e.g.:

http://www.sectorspdr.com/sectorspdr/

So, you can either:

1) Buy all the sector ETFs (XLY, XLP, XLF, XLV, XLI, XLB, XLRE, XLK, XLU) except for the energy sector (XLE)

2) Buy the SPY, short sell XLE.

Different tickers apply for iShares, or other indicies / sectors, but you get the idea - it's easy enough to focus on specific sectors using a mixture of ETFs.