COMMOM SENSE.....
Watch the surface your on whether using jack stands or ramps. Absolutely NO concrete blocks.
The right tool for the job (ramps or stands)
...maybe a friend to hang out with you while under the truck (he can hand you wrenches)
Even with the best precautions I personally like to keep a jack with just a little pressure, either under the front, back or side just for "insurance"
.....perhaps its because my dad had a IHC pickup fall and crush him breaking 13 ribs. He lived but barely.
