I am 60 years old. I grew up in a household, a neighborhood and a community where everybody had cocktails at 6:00p.m So - by some standards I am a light light drinker - drinking one to two glasses of wine a night.
But recently I see a clear relationship between the wine that I drink and my degree of happiness during the day. And it is like night and day.
Everyone knows it's a depressant, but I actually see the quality of my life diminished with wine. I think it's okay to drink occasionally - and its fun, but two nights in a row is too much.
There is also an absolute relationship in my life between exercise and depression. Recently I suffered a five-day bout with flu and I was unable to exercise. By the sixth day I was depressed. I got on my bike, and spent the next several hours exploring the area on my bike. By the time I returned home (which included climbing several hills), I felt 100% better. That morning I would never have believed that I was going to feel so great that night.
The exercise that I love the most is something with solid aerobic value. Walking up a hill is good, biking fast, running/walking - and for durations of 40-60 minutes. It's life changing.