Jewelry and Dwarven Bows my friend, I suggest you find all the Stones of Barenziah and loot up Dwarven Metal.
Dwarven bows are very nice for leveling up smithing. Dwarven ingots are so plentiful in dwemer ruins. But I disagree with you about jewelry. It's nice when your smithing level is low, but after you level up smithing a bit, there are far better, less aggravating ways of leveling up smithing.
I have done Stones of Barenziah twice, it's a very long quest that requires going to lots of locations. I imagine by the time you finish Stones of Barenziah, you explored at least half of the game and you are probably at level 50. And doing Stones of Barenziah efficiently is impossible unless you cheat by looking up in UESP, because there are no markers for the stones.
Making Jewelry is nice in early level. It's better than making iron daggers. But there are far better, much more efficient ways of leveling up after you reach level 50 or 60 in smithing. Upgrading expensive gear.