None personal are harder to get. Most easy way is to buy them from the store. Some events do offer te as rewards, but those are usually rare, and only gives out between 1-5 depending on the event.
The last way is, by grinding and trading. Abu has a great guide on trading, so go take a look at his thread in the encyclopedia of this forum. While you are there, you can also take a look at some of the other guides for new players .