The sales are great but are also easy to get caught up in the excitement of a "deal". It's only a bargain of you need it and will actually wear it! I find the sales are a good time to stock up on the basics or classic pieces that are wardrobe staples. And manchester- I love a good sale on sheets and towels!
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.
If there is a sale on, then I will browse to see if there is anything I like, but I don't specifically wait for sales to buy anything. I don't buy that many clothes anyway to be honest. When I do, I always have a budget on them in my head anyway. No more than £25 for a shirt and no more than £30 for trousers.