I gut load my crickets with Fluker's cricket quencher and also throw in any veggies I happen to have lying around for a little extra boost, right now I have romaine lettuce, potato, and celery. I heard that feeding crickets veggies like spinach and tomato is bad, though I'm sure exactly why, but you should stay away from those. I think I will be upgrading to Fluker's orange cubes though as opposed to the cricket quencher because it has more vitamins.

I'm mostly a newbie too so don't take my word for it, just thought I'd give you something else to work off of.