At one point, you might want to join a clan. You've perhaps seen other people who were members of one, perhaps you've heard them talk and roleplay about it, maybe you are simply looking for a group of like minded people who have the resources to further your position in the game. Whatever the reason, if you want to join a clan, you have to prepare.
How to join a clan .... in 5 steps:
Step 1 - Know your character
Your character is your basis. You need to know who your character is, what he/she does, acts, comes from etc. Having a description is a must. Most roleplayers have this pat down, but if you are still working on this, it might be interesting to read this and this.
Step 2 - Know your roleplay
A new character is like a new pair of shoes. They fit terribly. You need to wear and walk around with them for a while before they become more comfortable. The same goes for characters. Roleplaying with your character will help you work out some details and file down those rough edges you will find won't work. It will make your character come alive and you'll feel more confident roleplaying them if you have some experience. (Practice makes perfect.)
Step 3 - Know your clan of choice
Read the helpfiles on the clans and pick the one that you think fits your character best. Or roleplay with the clan's members to see what they're like. You need to figure out what they're about, what they're like and whether you'll enjoy hanging out with them. Often the helpfile also contains details that can help you out with writing your application!
Step 4 - Apply
Write an IC note where you introduce yourself and apply for membership of a clan. It should be clear as to why you want to join the clan, so explain your motivation for approaching them.
Step 5 - After application
When leadership is interested, they or other clan members will contact you for IC talks, roleplay. Eventually you will be interviewed and this will separate the well-prepared from those that are not. Interviews are usually with at least one leader present, often more, and possibly a few members. They will question you and in some cases also ask OOC questions since certain clans have alt restrictions. Eventually a decision will be made and you will hear whether you become part of the clan or not.
Last but not least, unless you dig betrayal, a clan is for life. So weigh your options down well before applying. Keep in mind that although well-fitted answers can patch up a sloppy first three steps during the interview, it does not patch up your future within that clan.
Good luck!