Are you running linux or windows? If you have windows you can join a pool from within your wallet. Launch litecoin-qt.exe
Use a pool like
http://www.p2pool.org/ It tells you what to put in the address, port, username, and password. Then press start mining. You need to have minerd copied in the same folder as your qt.
If you are using linux you can make a script like this:
then copy this code, replace the http: with your pool, the username.1 with your username, the password with yours.
#!/bin/sh
export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
cd /home/rig/cgminer-3.1.1-x86_64-built
./cgminer --scrypt -I 20 -g 1 -w 256 --thread-concurrency 21712 --gpu-engine 1090 --gpu-memclock 1500 --gpu-vddc 1.087 --temp-target 80 --auto-fan -o http://www.digicoinpool.com:443 -u username.1 -p password
Then chmod it like this:
then run and watch