Some of these suggestions and many others dealing with registration and check-in are in the above-linked Survival Guide.
A couple of other suggestions include the fact that there are comfortable sitting areas in the Exhibit Hall and the food vendors are quite good. Expect line. Wear warm clothes that can be layered to accommodate a range of possible temperatures. It is a good idea to have the bag or pack to store your coat and other extra clothing.
Salt Lake City is sometimes very cold and windy. Don't count on good weather. As I have pointed out in the past, Salt Lake City blocks are very long and there are eight blocks to a mile. The Salt Palace, where RootsTech is being held is roughly two blocks long and two blocks wide at the north end. Do the math.
Take the time to talk to those around you. You might make a few friends and get to know some fantastic genealogists. I am sorry I will not be there, but I am having too good a time serving as a Senior Missionary in the Maryland State Archives to feel too sorry about missing RootsTech this go around.