I'd also add that the best advice I've received is to do as much planning up front as possible to save myself from stressing out as my wedding day approaches. Plus it enables you to find things for better prices. It's nice to have some time to not do wedding stuff and give yourself a break.
And I've found that the less people you bring wedding dress shopping, the better it is for you to actually find THE dress that you love; bring only the person or people whose opinion/s you absolutely value--the rest you can bring when you go for your first fitting.
Oh, and to add on to centerpieces being costly, I saw one bride on here who purchased glass vases in the city where the wedding was held, bought some bright green limes, and filled the vase with water and the limes for a simple but elegant centerpiece that was easy on the pocketbook! I thought they looked fabulous! Think outside the box. It helps make your wedding unique as well as saves you some $$.
And if you're not sure about things, google it! Or search for threads here on BDW! Chances are if you have a question about something, other brides have already asked it as well, or they're willing to answer your questions if you ask.
Congratulations and good luck!!