Get Reading
You need to get reading some of the research publications from the larger estate agents.
Jeesh I sound like a flipping broken record at this stage!!!!!!
EG
Jones Lang LaSalle, Savills (HOK), CB Richard Ellis, Bannon Commercial (specialise in retail property).
Get researching, certain areas command a big premium with regards to key money, others don't. If you are a new start-up/franchise then there will be extra conditions attached to your new lease and you need to research this also.
Research, research, research.