Note: The following Tips & Tricks is outdated and does not work. For other ways to collect recommendations...
ROSES! ROSES! To quickly increase your recommendations, sell your rose stand for 3 coins and buy it back for 30 coins. Instant refill. Repeat as necessary. Word of Caution: Stop at around 65 recommendations (limit is 80) because you will have upcoming goals asking you to get more (6 to be exact). Rose inventory limit is 20 so serve them as you get them.