You just need something that won't hold water but will allow air circulation. I've set them on a couple of 1x2s and on bricks. Look around at what you have and prop them up a little.

The best solution I have seen is a suspension tripod. This of course works well if you have only two or three fruits to support.

Fashion a tripod out of 1x2's, metal rebar or whatever you have available. Then, centre it over top of the plant. Using an old pair of nylons, create a hanging sling into which the fruit will sit. It is then off the ground, open to air circulation and more accessible.

Personally, I use a handful of straw, but I have over 20 pumpkin, melon and squash plants to take care of.

If nothing else, rotate the melons about 1/3 of a turn a couple times.

I have never seen a healthy watermelon rot on the bottom.

I let my melons grow out over black plastic which prevents weeds and ensures no rot. Now you will need a drip irrigation to make this work, but I love it.

Here is a link that might be useful: Pictures of my garden

I have kept grass clippings under mine, and rot has not been a problem, ive also rotated them once they are about half the size they should be.

Those are probably great suggestions. Mine is very simple and I haven't ever had that problem again.

Simply place a hefty pile of dead or dried out brown pine needles under the melons. They don't hold moisture and allow air circulation.

But best of all they are free!

Don't laugh, but I saw a picture on one the forums using old bras or swimming suit tops as cradles. Check out the thrift stores and look for ones for "bigger melons"

I use small blocks of wood, 1X4 or 2X4. Has worked good for me.

jnifarm, a cheaper, simpler way is just to use pantyhose.

but the colorful swim suit tops will make the neighbors talk more about the nut next door

I did some of the above. I also used those rattan looking paper plate holders, flea market :baskets" anything that is "meshY" so air can move.......that raised them look around prob have lots of free stuff already....