Set a DCA weekly/monthly buy on BTC with fiat and forget about it.

Some alts are in a very sweet spot atm, ETH or HIVE are always good choices.

if you're looking for something a bit more volatile AVA, ORN, DAO, RUNE & SPS are clearly on my radar.

Best approach, besides BTC/ETH, pick 2-3 max and stick with them.