While knitting with small needles I have a problem poking myself from time to time.
I remembered that I have peel and stick quilting thimbles. I tried them and they work great. I had no problem with them interfering with the yarn while knitting. Best of all though I did not poke the needle tip into my finger again.
I don't know the name brand, but they are small oval, clear, peel and stick pads that you stick onto your finger. There on 32 per sheet.
They can be found in most fabric stores: Hobby Lobby, Hancock's and I'm sure others, and probably the Wal-Mart's that still have the larger craft departments.