I had someone last week ask me to do a post dedicated to just these things and so I am hoping this helps you other mamas as well!
Hands down, my go-to bow destination is Julia's Bowtique online. She has the best bows in my opinion, and they are very moderately priced as well. Right now, Carson wears the 3 inch bows and Caroline wears the 4 inch variety. Even better, if you're starting from scratch and need to build up your bow selection, she has sets you can buy with all the colors, which make great gifts, too!
When it comes to headbands, comfort is key and we have a few favorites that we shop from. All have shops on Etsy and we have had positive experiences with each of these amazing vendors featured below: Jameson Monroe, Little Loves Designs, Kena Bows, Cuteness Buns, and Our Baby Thompson Love
In terms of storage, there are so many fun and cute options that are totally DIY-able. For Caroline's bows, I used metal D-rings and then strung thick grosgrain ribbon and then hung them with tacks...nothing fancy, but it does the trick. Carson's are in a storage cube in her closet with a chalkboard tag marked "Bows". Here are some easy ways to store them via Pinterest: