What marketing tricks do we unknowingly fall for?

Source.

Last year i got Netflix in just because they give you the first month for free , but in order to get that first month free you still have to give them your bank details , and before i know it the second month rolls around and im being charged for the subscription just because i was too lazy to cancel it , i eventually got rid of it a few months later though because its s,hit and i hardly ever watched anything on it because i already downloaded and seen all the best films for free way before they appeared on Netflix anyway , so moral of the story is im a sucker for anything free , even if i dont want it lol

Had a boss that told me when i decided on a price of an item that it needed to end with odd # like instead of putting 2.00. End it with a 3, 5, 9. On the tag it would changed to 1.99 or 2.25. Said surveies say that for some reason it makes ppl thing their getting a deal.