Never Knowing What to Buy

My brother-in-law called this morning and was asking if I had any idea what to get my sister for Christmas this year. He said he always waits around to the last minute on gifts for her and claims he is not going to do that this year. Well I hope I have helped him in some little way by telling him some things I know she would want. After I hung up the phone with him, I was thinking to myself about what items I had told him. I then realized if I had told him any of the wrong things then it is going to be all on my head when it comes Christmas time. Maybe I should have not told him. What do you think?