Aralon is pretty good about pointing you in the right direction at first, so just follow the instructions and pick up the quests around the first town to get a feel for the game.
Save often. There’s no penalty or cost for saving, so play it safe and regularly bookmark your progress. You don’t want to have to repeat your heroic feats, right?
Know when to beat a hasty retreat. If you’re getting overwhelmed, it’s a good idea to make a run for it so that you can recover and come back with a better plan.
Make sure you’re linking skills and equipment to the toolbar for convenient use. Keep your best abilities at hand so that you can react quickly to whatever comes along.
Don’t forget to loot every corpse. Money isn’t the easiest thing to come by, and certain classes (Warriors especially) are going to need a lot of it.
Make sure you actually spend your attribute points when you level up. Just go into the menu screen and you should be able to assign a skill point and a stat point. They won’t do you any good just sitting there!