How to wipe out your gains

Friday afternoons can be tricky.. Large swings around London closing time today, big nervosity and indecision in the market gave me this disastrous finish of the week. In 3 lousy trades I managed to wipe out the 20% weekly gains I had before these. Price went very clearly against me and I could not close.. I can find excuses : I was very tired, the kids were making a lot of noise and so on... But the fact is there. An ugly way to waste one week's efforts...