thanks to the person who long ago suggested Velcro as a great rod rack for a closet. finally got my great big Round Tuit last night and cleared up the Spillikins pile of rod tubes in my closet:

take the catchy part of one-inch wide sticky-back Velcro and put two horizontal strips on the wall of the closet.

take the fuzzy part of the Velcro and stick it to the rod tube in two places where it can reach the catchy strips.

press the rod tube up against the strips on the wall.

hey presto! a rod rack on the wall! cheap, fast, and yes, you need to clean out the closet somewhat before you do this, so your spouse and the local thrift store will be happy too.