I like making bulletin boards easy....cute...impressive to parents...useful to students. Let's look at those four things.
I like to pick a paper or fabric that will get me through the whole year. Blue and black are good choices, but when I go back I may try brown wrapping paper....Look for that in my reveal. Get at least one extra set of hands to help hold the paper while you get it in place to be stapled. Use push pins to hold the fabric in place while you are getting it straight. Staple, when everything looks good. Minimal words at the beginning of the year. I like students to build up content for the boards.
The one below was a special door contest. Notice how big the whale is compared to the ladybugs the students made. 3D can be awesome if your fire marshals will allow (we get away with more during certain celebrations, like this book fair).
If you have a word wall use it!! Everyday...keep it growing. If you have anchor charts, build them, use them, build another (storing or giving the old one to the students to keep for reference).