to mine, whether the pool or solo, first things you need are a client and miner.
Grab the source: https://github.com/coblee/litecoin
Windows client binary: https://github.com/downloads/coblee/litecoin/litecoin-windows-client-40104.zip
You can mine the coin by using the default miner in the client. Just put "gen=1" in your litecoin.conf file.
Or you can use a CPU miner. Currently, you must use one of these miners that uses Scrypt:
https://github.com/ArtForz/cpuminer - Fastest but experimental
Here's a compiled binary for Windows:
You need to create a litecoin.conf file
with this content
#Change this if you want to use a different rpc port for mining
#Only uncomment this if you are running litecoind (not Litecoin QT)
and save it to
Windows: C:\Documents and Settings\<username>\Application Data\Litecoin
Mac: ~/Library/Application Support/Litecoin
4. Mining Solo
in your windows binary miner, edit the 2threads.bat file to adjust to the number of threads you want to mine with
(Don't put more threads than you have core, think of it as dividing by zero, you house will vanish in a black hole) then run it.
5. pool mining.
Once you have your client, head on over to the http://126.96.36.199/
signup with your LTC address
edit your mining batch file (2threads.bat from earlier) with the username and info given to you by the pool.
EDIT edited for typos and general morningness