Making money and contributing HELPS.
I didn't have summer jobs-- didn't have transportation, or really for that matter financial need.
I DID have a pretty responsible role to play at home. It was just Daddy and me when I was a teen, so during the summer I did ALL of the housekeeping, fooling with the animals, a fair bit of the lighter yard work.
Pretty much the only things I did not do were cook dinner (though I was responsible for prep-- thawing meat, cutting up veggies, such like) and mow the yard (I was afraid of learning to steer, and Daddy didn't want me using the riding mower alone).
I probably could have been-- and probably should have been-- responsible for those things too. Funny-- he would let me ride the four wheeler for miles and miles and miles and miles over the ridge as long as I took someone with me, but there would have been no way in Hell he would have been OK with me calling my aunt (right over the hill) before I got on the mower and as soon as I got off.
I had WAY too much time on my hands up that holler all summer. I got bored and lonely.
Come to think of it, I could have learned some great skills (and built some relationships) walking up the holler to help the folks that lived up there with the chickens and rabbits, or walking out of the holler and up the hard road to the next neighbors on up that way and helping them with housekeeping and horses.
Dunno about the horses-- horses always scared the crap out of me, so big and so nervous-- but it definitely would have been good for me to hire out (or even just trade labor for education) to the people that lived nearby.
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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"