Guide to gaining inscription from 0.

On Hybrid, the inscription skill is especially useful to PVP mages because of the added bonus to the spells 'spell reflection' and 'protection'. With GM inscription, spell reflection is effective against 15 circles of magery - this means you can reflect 15 first circle spells, three fourth circle spells, two sixth circle spells, and so on. Protection becomes more effective by completely preventing the mage from becoming interupted. Note that you cannot have both spells in effect at the same time.

GM tinkering

I used around 2.5k ingots with this, so don't worry too much about resources, since it's relatively cheap.

from 28-48, make keys and copy, etc.
48-93 make lockpicks (these only use 1 ingot)
93-100 make spyglasses.

This skill goes extremely quick, and is very useful for making good tools (shovels, sewing kits etc) for cheap. Also a necessity for making potions kegs, which are a popular item to sell.