Add a strip of trim a bit above already existing baseboards, paint between, and you get faux thick baseboards! Other good ideas here as well. 31 Easy DIY Upgrades That Will Make Your Home Look More Expensive
Painting an old radiator ( & or pipes ) bright color makes it a piece of art. After painting the whole exposed ceiling in the basement one solid light color . Painting some of the pipes funky colors is going to be GREAT!