I don't really have a system or set of principles. It's kind of common sense mixed up with instinct.
Underneath runs the main current of preoccupation, which is keeping one's nose clean at all times. This means that when things go wrong you have to pass the blame along the line, like pass-the-parcel, till the music stops.
I like pop music. I consider rock 'n' roll to be a branch of pop music.
We give advice by the bucket, but take it by the grain.
Be happy -- if you're not even happy, what's so good about surviving?
If you associate enough with older people who do enjoy their lives, who are not stored away in any golden ghettos, you will gain a sense of continuity and of the possibility for a full life.