Boy do we know how to stress ourselves out about the "happiest day of our life". We dream and daydream and Pinterest and save and imagine and then stress starts seeping in from the corners. Stress is finding cracks and holes to get through but it's totally up to you to overcome it and still enjoy the process.
A few musings to help you patch those holes, covers those cracks and power through stressful moments so it's not the new theme of your wedding.
My first musing is that this likely won't be the happiest day of your life. Ouch. The expectations alone can through all the wrenches in that ideal.
The happiest moments you'll look back on will (more likely) be when you go dress shopping with your best friend, drink too many bubbles and giggle over how ugly most dresses are. Your happiest moments will be the first time you held your brand new niece in your arms, when you hiked up that mountain in Alaska, when you stood up for yourself at work and it made a difference, when you snuggle your pet on the couch, sharing beers with your spouse because your other plans were rained out.
The little joys of life rally together and represent your happy times. Your wedding will be one of them but don't put so much pressure on your poor wedding to solve the everyman quest for "happiness". If you're on board with me so far then we're on the right track.
Next thought: how do you want your wedding to look and WHY? Write out key elements you want then follow up with why.
Reread your list. Time for cuts and compromises.
Example list of wedding details you're planning and WHY they're a part of the big day:
Signature cocktail - represents our first date
Outdoor venue - can't imagine it indoors
Big wedding party - my mom insists I have a flower girl
Dance party - my fiancee wants to partay
Pink and gold colors - I don't really care but my sister said this is trendy and cute
Cute umbrellas - it could rain, duh
Cute boots for under dress in case it does rain - I really don't want to move it indoors
You can already see there is room for cuts and compromises. I think it's healthy to consider both. No one wants to make mom mad but you can't let her plan the whole thing either. Cuts and compromises, think wholeheartedly about yours and make the call.
Next thought: money. Woooweee weddings are pricey. Even the little ones, even the DIY ones. Spend your money where you won't regret it. Do you care if every person leaves with a favor? Will you remember that years from now? Will they? We all have to make calls based on finances and one great way is to revisit why you're spending money on that particular thing/service/vendor.