Re-reading Reminiscences of a Stock Operator, I realize one big difference between my trading now and when I was profitable.

I was always able to look at my quotes 1 time a day and sleep soundly at night when I was making money.

A key aspect of my trading that I held highly in regard was to trade small positions. Positions so small that I do not even care about the daily P/L fluctuations. Now, however, I go through roller coasters whenever I have a position on.

Note to self: Reduce position sizing.

PS: To those who think small positions are a waste of time, note that I was able to return >30% of my portfolio by trading 1 lots, in a month!