It's so exciting!! I only visited three shops, ordered my dress in the second. I wore a strapless bodysuit and tights as I was quite shy about stripping off in front of strangers, though the will tell you they've seen it all before lol. The girls in the shops were very helpful and as I had no idea what I wanted exactly they pulled out loads of different styles. And although I didn't know what I wanted I knew what I didn't want. What I would recommend is question about things such as underskirts etc needed etc. This will help if you decide to find them elsewhere at a lower price - the whole ensemble mounts up!!

) Maybe take a shoe with the heel size you plan to wear as this will give you a good idea how the dress will look, though they will probably provide shoes. Where I ordered my dress they hadn't shoes in my size on the 1st day so I swanned about in a pretty frock and bear feet.
Also I'm not sure if this is for all bridal shops, avoid wearing make up / fake tan so it doesn't transfer - though that might only be for fittings when you try on your own dress. I didn't put any on at all just in case.
Most of all, ENJOY!! It's the best part but be prepared - it tiring and you can get baffled. You'll know the dress for you when you put it on! Have fun x