With my own strategy, I decided to take Buffett's advice and rely even more on the broad index ETFs (S+P 500), rather than trying to pick sector ETFs. So not only won't there be individual stock picking, but no (or few) sector ETFs. This will make for an extremely boring portfolio, but over time it should perform better and with fewer headaches.
For now I still have some tech related ETFs (cloud computing, cybersecurity), since they are doing so well, but eventually will replace those with the S+P 500 ETF (VOO). The S+P has 22% in technology, which should be plenty -