Stupid things you survive somehow become "experience"
My first backpacking trip in the Scouts in '74...I took a canvas pup tent and...A frikken claw hammer so I could pound them stakes in real good

And the pack I used was an old BSA Haversack-a non framed large day pack with unpadded canvas shoulder straps. It was a painful learning experience.
I wrote the following on another similar old thread regarding mistakes we have survived.
It's good to remember our mistakes. That way we don't repeat them and can feel free to screw up on something else.
I remember my first top-roping forays in 1980 or '81 with a few 'biners, some webbing, and a really sturdy black and yellow tow rope from the trunk of my friend's car. We tied the webbing off on some old iron poles on the backside of a short retaining wall along some Southern Pacific rail tracks.
The webbing and 'biners stretched to the top of the wall and then the rope curved over the 90 degree edge and down the front of the wall. Part way up we thought it would be cool to mimic Mike Hoover's pendulum running from his short film, Solo. It was nice to learn about what friction, and running a rope over a 90 degree edge, does to nylon without dying.
Another wonderful learning experience occurred in 1982 or '83 (memory is bad and I can't find the damn guide book where I keep notes.) We were climbing Bookmark, 5.8, at Lovers Leap. We didn't have a guidebook with us and we were going by beta solicited in the parking lot. Someone told us the first pitch was the crux.
We cruised up it thinking that it felt more like 5.7 and it seemed pretty easy. We looked at the short second pitch. Well, if we cruised the crux, how hard could this OW crack be? We laughed, racked our hexes and stoppers, and coiled our rope. My partner went first and carried the rack. I carried the rope and most of the runners. Well, a blind man could see where this is going.
My partner grunted up and through the pitch, quite shaken. I managed a little worse and was quite stuck at one point. Slowly, I see a length of webbing snake down to me. Cool! My partner says to grab if I need to. I step out of the crack and take hold of the webbing but don't put much pressure on it as I seemed to find some better holds, especially with this webbing there just in case. I feel pretty confident.
As I moved up to my partner I could see him wedged into the crack at the top of the pitch holding the other end of the webbing. I ask him what he's tied into. Uhm, I just stuck myself in the crack, he replies. The other end of the webbing, the one I decided to not hang off of but use just in case, is just being held in his hand.