Well, I don't remember the title of the thread, but I do use ziplocs a lot. YOu could do a search and just put in ziplocs.
For what I do, here ya go:
Each child has their outfits in bags, so I put top, bottoms, matching socks, and depending on who it's for, a pair of underwear. Then just press down as you seal to get out any air. Depending on the season we are going in, the bottoms will either be shorts or pants. Then separately, each child has two or three nuetrals of the opposite thing (shorts if pants are in the bag, etc) I don't put those in a bag, nor do I pack my DHs or my clothes in the bags, mainly because we do a lot of mix and match clothing to cut down the amount we need to bring.
I also put all toiletries in ziploc to avoid any spills, pack the diaper wipes in ziplocs, take any snacks we are bringing on the trip in bags so they take up less room than in their boxes and bring LOTS of empties of various sizes.
Hope this helps a little. The key is to really make sure you smush out the air in those bags.