Currently I'm earning 0.8 LTC/day with my HD7970 and GTX660TI, using cgminer and cudaminer.
Here are some good resources
Tweaking guides for different cards and mining software
Mining calculatorhttps://bitcointalk.org/index.php?topic=189499.0" onclick="window.open(this.href);return false;
https://forum.litecoin.net/index.php?topic=4648.0" onclick="window.open(this.href);return false;
https://forum.litecoin.net/index.php?topic=1240.0" onclick="window.open(this.href);return false;
https://forum.litecoin.net/index.php?topic=2355.0" onclick="window.open(this.href);return false;
LTC exchange ratehttp://www.litecoinminingcalculator.com" onclick="window.open(this.href);return false;
http://litecoinexchangerate.org" onclick="window.open(this.href);return false;
Mining pool that I like and use
http://www.mine-litecoin.com" onclick="window.open(this.href);return false;