Compliment someone on his or her fine work. It costs you nothing and can make some one's day.
I absolutely adore Danco Ordev's paintings, and I told him so.
I love the new abstract style he has developed, although I could not find any examples on the web.
But he is known for the style as pictured above; his buildings and landscapes go beyond the typical "static." His dynamic style really pops, rendering inanimate objects alive and roiling.
I'm not an art critic, but I know what I like.