Facing into the current helps keep you balanced, because the current is facing you head on, not from the side. Trekking poles also help, although a strong current can create drag and pull them downstream from you. How helpful they are will depend on the current, water depth and how skilled you are at using them. Be realistic when you gage the difficulty of the crossing and again, don't be afraid to bail out. I wouldn't advise using a rope, unless you are specially trained in river rescue.
Hot drinks are another good idea.
Finally, talk to rangers before you start to get a feel for current conditions, and maybe even alternatives. After all, the point of all of this is to have fun. All rights reserved.