Sending from Mex to yourself in US

[Kelakarekrew]

I was recently in Mexico and able to buy Xan, Clon, Soma etc over the counter. The bars were a little pricey in small amounts and the farmacia offered a much better deal with volume discount. I only bought a few and I carried them back (30 bars, 30 clon) with no worries just by putting them in loose in with aspirin, tums, etc and checking the bag.  

The question is has anyone had experience shipping stuff back to themselves to avoid any airport customs worries? I'll be going a few times a year it seems and I'd much prefer not having any worries while going through customs.