Getting Started Guide

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.
Fabulous Panda
CPU Miner

3 Configure your miner.
NOTE: We don't check worker password. Set password as difficulty in range of 1 to 1024. Default difficulty is 1024 if not set.
If your using Linux, Then type the following into the console:
./cgminer --scrypt -o stratum+tcp:// -u Weblogin.WorkerName -p 512
./bfgminer --scrypt -o stratum+tcp:// -u Weblogin.WorkerName -p 512
If you want to mine on a Windows Operating System, then you'll need to create a batch file to start your miner. Simply open notepad and then copy and paste the following:
cgminer --scrypt -o stratum+tcp:// -u Weblogin.WorkerName -p 512
bfgminer --scrypt -o stratum+tcp:// -u Weblogin.WorkerName -p 512
minerd -a scrypt -t 6 -s 4 -o stratum+tcp:// -u Weblogin.WorkerName -p 512
Cudaminer For NVIDIA Cards
cudaminer -o stratum+tcp:// -u Weblogin.WorkerName -p 512

You then need to change "-u Weblogin.Worker -p Worker password" to reflect your own account. Eg, "-u Steve.StevesWorker -p Steves512" then go to "File > Save as" and save the file as "RunMe.bat" in the same folder containing your miners application files. You are now ready to mine, double click on "RunMe.bat" to start mining. If you want, you can create additional workers with usernames and passwords of your choice here

4 Create a MarsCoin address to receive payments.
Downloading the client & block chain: Download the MarsCoin 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.