You should be willing to transfer but I don't think it's good to blindly transfer.
There are many ways to look for a guild and your process has to change based on what you want out of a guild. Here are some methods from least involved to most involved.
1) trade chat: lots of guild advertise there. Pick one and try it.. if you don't like them try another.
2) PUG: Jump in random groups. If you like some one ask them about their guild. You can learn about tons of guilds that way.
3) apply: Lots of the top raiding guilds have an application process. These guilds are more serious about the content they play and PUG random people less so you might not meet them while trying to find random groups.
Important things to consider when looking for a guild are times of the day you are free and if that is when your new guild plans on runing guild events like raids and pvp. Some guilds focus more on results and less on the social side of the game. Knowing what you want out of a guild can go a long way to finding a good guild.
Addons.
Gladius is a very useful PvP tool that provides you with unit frames for your opponents, allowing you to perform actions to the unit frames, themselves. Mine is set up so that right-clicking a unit frame makes that player my focus target. I also have other clicks set up, such as Shift + right-click, which causes me to use Polymorph on the clicked target without ever having to have them targeted or focused.
More recently, I've dumped Gladius and just used Clique, which is a good all-purpose tool for handling clicks on unit frames (raid frames, arena frames, boss frames, etc.). You can set up clicks to do the same thing as Gladius, but you have to specify that the click is meant for a non-friendly target.
In large-scale PvP, Battleground Targets is similar to Gladius, but provides less detail per enemy (since it can show up to 40 targets), reducing each target down to a customizable bar and icon(s). By default, left-clicking an enemy will make them your target and right-clicking an enemy will make them your focus target.
These addons are very commonly used throughout the PvP community and help you to easily make informed decisions and quickly target the correct enemy.
Alternatively, if you don't want to use addons, you can quickly set your current target to your focus target with the macro command, "/focus." I have a macro that I use for this purpose:
/focus [nomod]
/cleartarget [mod]
When using this macro, you can set your current target to your focus, clear your current target (by holding a modifier, such as Shift), and clear your focus (provided that you don't currently have a target) since /focusing a non-existent target clears your focus.
You can also use macros that target specific players. For example, in a 3v3 Arena match, you can target each opponent using arena1, arena2, and arena3 like so:
/tar arena1
If you have space in your keybinds (eg. the Num1, Num2, and Num3 keys), then you can change targets quickly by just pressing a button.
Best Answer
Although extremely annoying when people use them to spam trade, inserting icons into chat can be very useful for certain situations, especially for party/raid leaders (even tanks leading groups who want a macro that says "skull first, then x, sheep moon")
The easiest method for me is to put the name of the symbol in curly braces as such: {skull} You can also reference them by number, which can save space in macros but is less clear what each icon is: {rt8}
The full list of icons are: