World of Warcraft – How to See Heroic Dungeon Locks for Lower Level Dungeons

As a Holy Paladin, look for gear that has Intellect (increases Mana pool), spellpower (bigger heals), crit and haste. don't specificially gear for MP5/spirit. Unforunately for levels 60-70, gear will be a hodge-podge. Look at cloth, leather and mail gear as well, as some of the pieces are better itemized for healing, then the plate items available from outland. Keep you divine plea up, and use judgement of light up to help your healing and keep your haste buff up. Switch to judgement of wisdom if you're mana is getting real low. Also decide if you want to spam Holy Light (more crit) or Flash of Light (more SP). Check out EltistJerks.com, their fourms have a lot of useful info on gearing, though it is aimed more at end-game raiders.

What used to be the minimum required skill to fish in any given area is now the minimum required skill to not catch any junk. Once you meet or exceed this minimum for a zone, whether natively, or through the use of equipment, buffs and consumables, you will no longer catch ANY junk. If you are below this skill level, the chance of catching junk is proportional to just how far below it you are. The further below the threshold, the more junk you'll catch.

The exact formula for the chance of catching a fish when your skill is below the threshold is ((current skill/threshold skill)^2).

For example, the Dalaran Fountain has a no-junk skill of 525. As we can see in @GreatBigFish's answer, this junk threshold is above the (unbuffed) WOTLK maximum skill of 450. Fishing at max skill in Dalaran with no lure would yield a 'fish' roughly 73% of the time. The other 27% of the time, you will catch one of the 13 'junk' items found around the world, all of which vendor for mere copper. To never catch junk in Dalaran, you'd need to use a +75 lure or better at 450 skill.

There is one notable exception to this rule: You will never catch junk in a pool. Fishing from pools gives a 100% catch rate on whatever type of fish spawns in that pool. This has caused many to claim that actively leveling fishing skill is now pointless because it provides little practical benefit - fishing from pools is always more efficient anyway.

For more information, El's Anglin' provides a tremendous resource on the subject of fishing.