Working in events and flowers tends to make one numb to a Holiday like Valentine's Day. This I think is a good thing because I am now immune to the pressures of the day. That feeling that if one does not meet some unspoken expectation it could be the end of an otherwise perfectly stable relationship.
The one piece of advice I can give, is do something out of the ordinary. My favorite is to not succumb to the traditional, stand out from the crowd! For instance, avoid the traditional dozen red roses and go for something more unique and tailored to your loved ones personality (if their favorite color is orange - go with it). Basically think outside the box a little it will make you stand out and in the end be more memorable. Think of the points you'll score!
Happy Valentine's Day!