Mix 50:50 with perlite. Be carefule about the fines in the perlite. You may need to sift it through a coarse kitchen strainer. No sand. Don't use containers without drainage holes even for the haworthia.

And if it's ceramic it can be drilled, sometimes with a masonry bit but mostly with a glass/tile bit. A drill press equipped with one of those bits will help a lot, too, particularly with the thicker pots, which you'll want to cool with water as they're drilled.

Thanks! I will try to get rid of the fines in my perlite before I mix it with the succulent soil then.
I will be doing that in a week or so, will check back here if any more questions come up!

It might also be worth looking into coconut coil or coconut husk chips.

I have my plants in 100% coir and they're thriving, but you can easily mix it with perlite or pumice or buy the husk chips for a better draining mix.

Here is a link that might be useful: Coconut soil topic and information

Cool, thanks! Although I haven't seen coconut coil in local nurseries though... wouldn't know where to get it

Question about the coconut coir (David, it's coir, that was a typo above): I just ordered a small brick of it through amazon for use with a few of my orchids, and all the descriptions say it retains water ... though many here say it's free-draining enough not to rot succulents.

What's the consensus, from those who use it?

Edited: right after I posted I found this thread, which answered some questions:

Here is a link that might be useful: Coconut coir thread

This post was edited by Danielle317 on Thu, Jun 12, 14 at 15:05