I have been doing so for 6 years now and I think it's time to talk about it.
Here's my system that has been paying my rent and then some for years and it's called:
Trade the gaps.
It takes approximately 2 minutes every week and the one thing you need to do is trade the gaps when markets available on sundaynight.
Yes. It's that simple.

Pairs I trade: EURUSD, GBPUSD, AUDUSD, USDJPY, USDCAD, EURGBP, EURJPY, EURGBP
Pretty conservative. I trade 5 lots and on average make #8364; 1300 a week with 2 minutes of work. The gaps are filled about 99% of the time. My SL is 50, my TP is the close of Friday. That's all. Enjoy your life! You'll have a lot of time to do all you prefer.
Backtest this and persuade yourself. The only reason you can lose is when you choose to trade some more during this week.