Keeping it simple...
I have a confession to make: I over-complicate things. I find it very difficult to stick to simply trading the asset classes via the funds that I use.
If I think commodities are starting to do well I will often buy into another commodities fund, or start buying some individual mining stocks, or a commodity ETC. This sometimes works well, but often doesn't.
The main complication of doing this is that I start to think about other trend-trading opportunities, and spend a disproportionate amount of time scrolling through charts. This fills my mind with trading 'rubbish' and distracts me from getting the best out of each day, as it tends to support the erroneous belief that life will be better at some time in the future (when I have made millions, presumably).
It's nonsense, of course, and I am resolving to try and 'keep it simple'...... lets see if it works!