Is there a thread or guide on each quest that might help players find what they need instead of wasting hours on hours and finally give up because of lack of one or two items?

Here's a good one. Last Chaos Quests

They tell you what you need to do, and if you want we can discuss the quests here.

that site is really nice for randol, any thing for dratan or merac that you might know about?

Here's one, its harder to understand, but it does every city.
Last Chaos Quests: Shards Of Splendor Site

Here's a quest list to level 30: http://lc.sector-5.de/index.php
And from level 30 up: http://lastchaos.aeriagames.com/forums/viewtopic.php?t=9231

Check My signature there is a Quest catagory with many quest guides listed.

I think we should have this stickied, It's very useful!

Yes each site has been helpful. thanks guys.

Good job helping out everyone!

I usually use the LC Wiki (even though it is sadly out of date, and has as many typos as my posts tend to have).

So there is yet another guide for you.