Notes to self:
Because you like the blue one, and it fits, and it was a bargain, it doesn't necessarily mean you will like the pink one. Plus, you hate pink. Remember?
When you've got the garment out of the packaging, and tried it on, ask yourself this simple question: would I buy this if I were in a changing room and didn't have to pack it up and trudge off to the post office if I didn't like it? If the answer to this is no, then SEND IT BACK. Now. The regret you feel now will be as nothing compared to how you will feel six months down the line, when the damned thing is still sitting unworn in your wardrobe.
The same applies to gifts. The recipient won't appreciate that you spent hours choosing that Thing online if they - and you, secretly - know they probably won't like it.
Because something is in the sale, this does not mean it is nicer. In fact it's almost certainly not. That's why it's in the sale. You're tempted. Of course you are. But remember the old mantra: a bargain is not a bargain if it's not something you like or need.
If you see something you really, really like, and it's available in your size, and you can afford it, then BUY IT. Do not wait, and wonder, and brood, and finally decide, only to find it's now available in every size but yours.