Too much to list! Having started at the tender age of 14, a LOT of water's gone under the bridge, and plenty of that water was pretty murky!
Main things are that cig'rettes'n'whiskey'n'wild, wild women are a distraction at any age.
You always have too many expenses for your level of income.
You always have too much junk for the space you have available to keep it.
Life's too short.
Life's better than the alternative, although the last bit of life can be pretty unpleasant.
Summers were always longer and hotter while winters were colder with more snow.
No matter who you vote for, government always wins.
If it can go wrong, it will and when it does, it'll be at the most inconvenient time possible!