1. Create account.

• Register here, or login if you already have account
• Create a worker that will be used by the miner to login

2. Download a miner.

• CGMiner Linux/Windows: Download here
• CGMiner Mac OS X: Download here
• Asteroids GUI Miner Mac OS X: Download here
• BFGMiner Linux/Windows: Download here
• CPU Miner Mac/Linux/Windows: precompiled binaries are available Download here.

3. Configure your miner.

Settings for Stratum (recommended):

STRATUM:	stratum+tcp://{$SITESTRATUMURL|default:$smarty.server.SERVER_NAME}
PORT:	{$SITESTRATUMPORT|default:"3333"}
Username:	Weblogin.Worker
Password:	Worker Password

If you use a command-line miner, type:

CGMiner

./cgminer {if $GLOBAL.config.algorithm == 'scrypt'}--scrypt{/if} -o stratum+tcp://{$SITESTRATUMURL|default:$smarty.server.SERVER_NAME}:{$SITESTRATUMPORT|default:"3333"} -u Weblogin.Worker -p Worker password

BFGMiner

./bfgminer {if $GLOBAL.config.algorithm == 'scrypt'}--scrypt{/if} -o stratum+tcp://{$SITESTRATUMURL|default:$smarty.server.SERVER_NAME}:{$SITESTRATUMPORT|default:"3333"} -u Weblogin.Worker -p Worker password

If you want, you can create additional workers with usernames and passwords of your choice here

4. Create a {$SITECOINNAME|default:"Litecoin"} address to recieve payments.

• Downloading the client & block chain: Download the {$SITECOINNAME|default:"Litecoin"} client from here.

  Generate a new address and input it on your account page to receive payments.

5. Advanced cgminer settings / FAQ

• Scrypt readme
• Don't set intensity too high, I=11 is standard and safest. Higher intensity takes more GPU RAM. Check for hardware errors in cgminer (HW). HW=0 is good, otherwise lower intensity :)
• Set shaders according to the readme (or look at your graphic cards specifications). Cgminer uses this value at first run to calculate thread-concurrency. Easiest way to get this optimized is to use same settings as others have used here: here.
• There's also an interesting project which gives you a GUI for cgminer. Windows only it seems.
• Here's a great guide how to get up and running with Xubuntu.