I definitely wait for the sales to stock up on kids clothes, as there are so many savings to be had. For myself, I find that the things I want to buy for myself aren't normally on sale, so whilst I might pick up a few things that I like, I definitely wouldn't be waiting all year for the clothing sales. Whilst not a full follower of fashion, the clothes I like tend to be the ones that are in season and thus not likely on sale when I want them. For this reason, I like the 10% off the whole store type sales.
I buy a few of my clothes online from the UK and look out for free delivery deals etc.