macdsm

I hate dealing with electrical problems. My truck was running fine all morning then came out of a store and when turning the key no power anywhere; no headlights, radio, no nothing. My son came to jump it and after 20 min. had the truck running and I went home and parked. This problem happened last Fall and replaced the solenoid and battery (it was past due). Do I have a bad ground? Any suggestions in chasing this problem down? Thanks for your input.