I have my share of tech toys: laptop, kindle/tablet, phone. I have brought a heavier camera in the past, though more recently used a cell phone camera.
On a longer trip, I have also occasionally either picked things up e.g. shipping to an Amazon locker is useful in the US or sent things home, e.g. UPS. As examples on most recent six month trip:
- I figured I wasn't using my camera as much, so mailed it and my warm hat/mittens home after I was done using them
- I experimented with getting a portable bluetooth speaker to play podcasts once I was in more sparsely populated regions, picked it up from an Amazon locker
- I splurged to figure out how much weight I had lost; I order a portable travel scale to pick up from an Amazon locker. A week later I mailed it home via UPS but had a few weights.
Definitely have swapped out clothing with changes in seasons/climates and picked up or dropped off things along the way, e.g. traveling through India as part of a longer trip I figured I wasn't camping for a while so left a tent/sleeping bag/pad with friends, traveled for a month and a half and then retrieved them again.