I am knitting a green gable (http://www.zephyrstyle.com/catalog/item.cfm/2367447/2628822), which is knit in the round, and want to add some increases around the hips (not specified in pattern, but a lot of others have done this modification). Which increase should I use? I want it to be as invisible as possible, and there is no seam. Thanks in advance!!

Amy has some great videos on different increases. Just go to "Advanced Techniques" at the top and you will find the videos.

Personally I'd place a marker at the halfway point of the round, and then (assuming there's already a marker at the beg of the round) increase 1 st on each side of the each marker every third or 4th row. I'm partial to M1L and M1R. :D