Erm...
Don't waypoint everywhere otherwise you'll just waste your money.
Get into a good guild as soon as you can! If you want to, of course.
Play around with different skill combinations (although I'm sure you know that as you come from GW1).
Use different weapons in the lower level areas so you have more skills to play around with as you level up.
Invest in karma armours. These are found at the heart NPCs after doing the heart. They save a lot of money.
Gather everything and always keep every kind of tool equipped and suitable for the area (copper for level 1-15, iron for 15-25, etc).
Salvage kits are your friend if you want to craft. If not, sell the junk for extra money to play around with
Be friendly and revive everyone you come into contact with.
Drop down a lot of AoE spells when in parties or big events. Big heals are always helpful!
And last but certainly not least: have fun!