What Rares to pick up.

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xBeWarned wrote:

Like if i pick up a rare armor, with 2 30+resists and life 60+ thats good right?

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First, you only pick up good bases, i.e. body armours with the highest or nearly highest base armour, weapons with highest damage etc. You'll have to learn those bases (though item filters help a lot), and can look at something like http://pathofexile.gamepedia.com/Body_armour to quickly find out which bases are good.

Second, you need high rolls. In leagues that have gone on for some time or in Standard, that means tier 1 or tier 2 rolls usually. But which stats do you want on your items?

The short of it: Weapons used for dealing damage need %increased physical damage + flat physical damage + attack speed. Body armours and shields need high defense (ES/armour/evasion) + good life roll + resists. Other stuff needs mostly high life + high resists though boots need movement speed as well, and helmets can be good if they have very high defense (ES/armour/evasion). If one of these stats is missing sometimes you can master-craft it on. You can see what is considered high for a certain stat at http://pathofexile.gamepedia.com/Affix - 25% increased attack speed is great but 25% increased physical damage is very poor. There are some stats which are almost always useless and can be ignored: accuracy, flat life regeneration, stun recovery, damage reflect.

But: be prepared that even with careful choosing ninety percent of items you identify will be vendored, and almost all the rest will only be worth five Chaos...a body armour with 1.9k armour and a high life roll but little resists won't even sell for two Chaos. A good weapon base with high physical damage (increased and flat) but no increased attack speed (and no way to mastercraft it) isn't sellable either. If you're not sure about the worth of an item search for similar ones on poe.trade and price/vendor accordingly.

Also pick up 6-sockets (vendor for Jewellers).