0. Gather info before hand about water levels/currents if possible.
1. Do not cross barefoot. Cuts and in some places water-borne microbes that often require antibiotics different from the ones most people carry as there do it all antibiotic. Feet do not have good traction!
2. Take a good look around, there might be a better crossing. Nothing like looking back and realizing this.
3. If you are wearing waterproof footwear and just talking about a quick splash here and there, a light membrane gaiter does wonders. I use these a lot. Keeps you from ripping up your pant legs with the other foot and keeps gravel out too.
4. If there's any doubt about what you are stepping on etc, currents etc, do NOT even think about wet feet; think about what you are doing. If you anticipate this, do not wear goretex boots. Wear something mesh that dries quickly. I prefer a wool sock with this. Find it doesn't blister as much when wet and is warmer than other materials. Make sure the mesh is fine enough not to let in little bit and pieces — I've sent back a couple shoes for this reason. (If in doubt, order from a place that takes stuff back.)
I have been caught in situations with wet goretex boots in cold weather. Dump out the water, wring out your socks, put plastic bags over your socks and put your boots back on. This will markedly improve your situation.
Tipping over in a current with a heavy pack is SCARY. The current can quickly take you into deeper water.I don't know if this is standard advice, but my inclination is to get out of a heavy pack — risking losing it. I have only been in this position a couple times. I would be interested to hear from Roger on this one.
5. I know I will get abused on this one but that's OK! I take Crocs as camp shoes often. I have crossed streams in them and find the traction on slippery rock surprisingly good. I have done this when I think it's too cold to have wet feet for a few hours. I would not use Crocs in a serious current or where I can't see what I'm stepping on.
4WD crocs are available and may be just the thing. I might order some and check them out. Sure they will be heavier though. Last, I checked Amazon had them.