I was a daily drinker from age 18 till age 39.
I started off being a few cans of beer a night and sessions at weekends.
By my early 30s I drank at lunchtimes as well as an increased amount at night.
By my late 30s I was drinking up to seven pints of beer every lunchtime and vodka or whisky every night.
From Jan 2012 until I quit in Feb I drank a minimum of half a bottle of vodka a night poured into my cans of lager so my wife didn't see how much I was drinking. The vodka was hidden away and she didn't know I was drinking it, I got 3 drinks out a half bottle.
At the end I was chugging vodka neat and chasing it with lager. I could put away a quarter bottle of vodka in under 30 seconds.
When I look back on this now I have written it out my decline was obvious for all to see, never again.