This question seems to be frequently asked, it'd be kinda cool to get a sticky or get it added to one of the how-to documents
I've answered this one fairly completely on previous occasions, check my search history for this subject
A quick answer would be
Save rings with max intensity or useful mods (FC1, DCI 10-15, HCI 10-15, FCR 2-3, etc) and unravel any with "doesn't make sense" mods. The lower intensity mod ones can be great for "training" gear for a new character when you don't want to spend money.
Save weapons with good mods like balanced, high SSI, split resists, unravel any with "********" mods like resists on the weapons or other things which "spoil" an otherwise good weapon.
Generally unravel armor as it has neither the mods nor the intensities you'd want. But if you find something good, of course keep it
Save ANYTHING with 401+ intensity and have a gargoyle imbuer unravel at the queens forge, to get a relic. Having the EC and the Copper_Enhanced mod as well as the mod that lets you see item intensity is key to getting this to work great.