Few tips that I picked up talking to people who played and beta and things I learned for myself.

You get 8 guildleve's per 48 hours, make sure to group with others so you don't run out of these. You get exp. and loot off of others guildleve's as long as you group with them.

Play atleast one DoW/M, DoL, and DoH. Something to do with exp. Not sure how the whole thing works yet.

Alch. is the easiest DoH to level at the begining. Just buy "Muddy Water" an.d purify it.

Use class Macro's to change class's. There are guide's all over the internet.

Tedious battle sequences you find yourself doing over and over again can be made into easy macro's.