Guilds
If you were wondering how to join a guild, you've come to the right place! This means you, Thieves Guild hopefuls!
Mages Guild: Mages can join in any town and begin gathering recommendations. Once all recommendations are earned one can enter the Arcane University in the Imperial City, home of enchanters and powerful trainers.
Fighters Guild: Although there are chapters in every town, seek entrance to this guild in Anvil, Chorrol, or Cheydinhal.
Thieves Guild: There are no chapters to find, but rather several alternative means of gaining admission. The simplest is to read the wanted posters of Gray Fox, then butter up a peasant (persuasion/bribes/charm) and ask about this notorious thief.
The Arena: Easy, it's right there on the map, in the heart of Imperial City. Go down into the Bloodworks sometime during the day and talk to Owyn.
Dark Brotherhood: You don't find them, they'll find you. Considering the nature of this sinister cult, you might pique their interest in you by committing a murder in cold blood. And I always feel a bit sleepy after a senseless killing, don't you?
Fight Club: Sorry, I can't talk about Fight Club.
Houses
You, yes you, can buy your very own house in any of the major cities of Cyrodiil! Most of the time, you'll have to butter up the person selling the house before they're willing to offer it to you. Prices, however, are non-negotiable. Here's the nitty gritty of it:
Imperial City: The Waterfront Shack costs 2,000 gold. Talk to Venicia Melissaeia at the Office of Imperial Commerce in the Market District.
Bravil: The House for Sale costs 4,000 gold. Talk to Count Regulus Terentius in the Castle Bravil Great Hall.
Anvil: The Benirus Manor costs 5,000 gold. Talk to Velwyn Benirus at The Count's Arms and complete his quest.
Leyawiin: The House for Sale costs 7,000 gold. Talk to Count Marius Caro in the Castle Leyawiin County Hall.
Bruma: The House for Sale costs 10,000 gold. Talk to Countess Narina Carvain in the Great Hall at Castle Bruma.
Cheydinhal: The House for Sale costs 15,000 gold. Talk to Count Andel Indarys in the Cheydinhal Castle County Hall.
Chorrol: Arborwatch mansion costs 20,000 gold. Talk to Countess Arriana Volga in the Great Hall at Castle Chorrol.
Skingrad: Rosethorn Hall costs 25,000 gold (requires 15 Fame). Talk to Shum gro-Yarug in the Castle Skingrad County Hall.