Tir Chonaill's Arbeits:

Here is how you get a decent amount of mabinogi and exp quickly in 1 game day by doing an arbeit course in the newbie town known as Tir Chonaill. (However, I highly recommend you do the arbeit course in Dunbarton described further down in this section instead because arbeits in Dunbarton are mostly delivery quests and more straight forward to accomplish.)

Tir Chonaill During Night Time
-Gather 10-20 Wools from sheeps. (You'll need a Gathering Knife or any bladed weapon to shave sheeps.)
-Gather 5 berries by hitting bushes and trees with your bare hands if you still have the stamina and time. (This is not important anymore since CP1 makes it harder to get berry quests now.)

Tir Chonaill @ 9:00am (High Priority)
-Go to the Potion shop/house north of the town.
-Talk to the Potion NPC (Dilys) who sells potions inside the house.
-Get and accept themabinogi gold from Dilys.
-Her quests are:

1:Task: Collect 10 sheep Wools.
Exp: +100
Reward: 225mabinogi

2.Task: Deliver potion to the Town Mayor (Duncan)/Teacher guy (Ranald)/Grocery girl (Caitin)/Shepherd boy (Deian). The destination is random, so it's best you remember the NPC names in town.
Exp: +100
Reward: 90 mabinogi gold

Time left: 9 hours.

-Talk to the Potion NPC (Dilys) again after you have 6 hours left for this arbeit. (Dilys will not reward you even if you finished her task before that time.)
-When reporting an arbeit, just click on the first left-most button in the NPC dialog box. Don't click on the second button if you see one since it will bring you to a trading window.
-If you cannot complete the delivery arbeit, throw away the potion in your inventory. This applies to all delivery items for delivery quests.
-Try to complete the Potion NPC's arbeit as soon as possible and do the second wool arbeit. If you have no idea what is requested from you in this arbeit, cancel it and go to the Shepherd boy (Deian) by 10am so that you can proceed to the next arbeit.

Tir Chonaill @ 10:00am but before 3:00pm (Highest Priority)
-Rush to the Shepherd boy (Deian) located in the far north-east part of the town, standing next to a wooden cabin.