Pipe weed would be a good example there, also umbrellas - the main trouble is that things like textile manufacture and food production are in the list of "Tolkien couldn't give a flying armadillo about this". Which is true of much historical source material as well - as historians, a good deal of our material culture evidence is archaeological, which doesn't work so well for Middle Earth...
I guess the other point to note is that for much of human history there have been relatively few big leaps in technology available to ordinary people - if you exclude the elves and dunedain and so on and just timeline the technological advancement of ordinary humans in Middle Earth (which you actually don't need to, because I did it myself :p ), the rate of advancement doesn't work out as different as I expected before doing so.