For the first several characters

There is also the option for lower leveled people(mainly those between levels 10 to 30) to use the Orbis exchange quest to level quickly. Though they aren't always easily available to buy in the free market nor are the quest items dropped from monsters that characters in this level range can usually defeat. It can be a very fast way to level up to the mid 20s.

Then there is the option for buying leech. You pay someone (Nexon has made a statement paying for this in mesos is legitimate in their eyes) to party with you and do the fighting for you. All you have to do is sit back and gain the easy experience. With the exception of leeching from Anego and bigfoot (where available), leeching is usually for those level 75+.

These, of course, all use more mesos than you would normally gather while training. Meaning you would need a good way to make mesos.

For the first several characters I made, I did train the way I now consider the "slow way" I would train until I either ran out of mp or hp then sit in a safe place waiting for it to recover. Leveling seemed to take forever. I am happy to say, both with better starting equipment and the ideas used here, what used to take me up to a week to accomplish, I can now do in a few hours of play.