1. Vitamints - signed up on their website (not sure if they are still available) You can purchase these at any Rexall or Shoppers Drug Mart.
2. Lindt chocolate bar. This is not actually a sample. I won this a few months ago and it came in the mail about 2 weeks ago. Lindt had a spin to win contest (now over) and I was lucky to receive one. At least they didn't send me the actual chocolate bar or it would have melted.
3. Signed up for Gerber last year so it is nice to receive samples and coupons from them once in a while.