Now THAT is a tip.
I have loads of Iron ingots...
Yeah it was the one of the best things I learned about the game

Get crafting, no point in hoarding. But once you get to a certain crafting level you will have to move onto steel, then Orichalcum etc etc.
Another Tip is if you are doing Alchemy get keen eye, it really makes a huge difference. It's not really needed for the other crafts.
Join a guild too, even if you don't want to. It's the easiest way to get Traits, because somebody in the guild will be able to craft something with the trait you need to learn. Also it gives you access to the various stones for crafting in other race types.
Alchemy is frustrating, so is enchanting. Provisioning is one of the easier one to level up. You really need a guild for enchanting, it takes forever!!
Oh and if anyone is doing alchemy, here is a great list for getting all the traits, Getting traits means more experience gain. Also, use the highest level reagents you can for better experience and quicker levelling.
Blessed Thistle + Dragonthorn
Blessed Thistle + Stinkthorn
Blue Entoloma + Bugloss
Blue Entoloma + White Cap
Bugloss + Columbine
Columbine + Mountain Flower
Corn Flower + Lady Smock
Corn Flower + Violet Coprinus
Emetic Russula + Stinkthorn
Emetic Russula + Violet Coprinus
Imp Stool + Mountain Flower
Lady Smock + Violet Coprinus
Luminous Russula + Mountain Flower
Blessed Thistle + Namira's Rot
Blue Entoloma + Namira's Rot
Bugloss + White Cap
Columbine + Wormwood
Corn Flower + Wormwood
Dragonthorn + Stinkthorn
Dragonthorn + Water Hyacinth
Emetic Russula + Water Hyacinth
Imp Stool + Luminous Russula
Imp Stool + Nirnroot
Lady Smock + Namira's Rot
Luminous Russula + Wormwood
Nirnroot + White Cap
Luminous Russula + Water Hyacinth
Namira's Rot + Nirnroot
Namira's Rot + Water Hyacinth
Namira's Rot + Wormwood
Nirnroot + Violet Coprinus
Water Hyacinth + Wormwood