Homemade glue : Flour, sugar, water & white vinegar = better cheaper Mod Podge (brand of glue useful for collages and other projects where you want to stick things down or seal a surface). It's too expensive.
Rubber Door Mat Wall Art (good idea for the metal screen for the air return on the laundry room door)The most frugal decor idea I've ever seen: a vintage iron piece for the wall. Go to the dollar store for an outdoor black rubber door mat. Then spray pain
Transfer a Photo onto a Slab of Wood: cover wood with gel medium; place paper picture-side down; firmly smooth out all bubbles; let dry overnight; gently rub wetted paper off; clean all paper residue off; cover with mod podge; let dry;