50:50 – equal numbers of positive and negative feelings – that is not enough.
Even a ratio of 2:1 is still too little, a ratio of 3:1 is needed.
That means, for every 1 emotionally depressing experience, there should be 3 positive experiences that lift us up again. Thus we succeed in a positive attitude towards life and long-lasting wellbeing (see Barbara Fredrickson, 2011).
Be sure to actually feel the positive feelings and not fake them for yourself or your body.
Be aware that we cognitively create our feeling in the emotion itself through our evaluation of a situation.