You're going soft Gringoboy..
You can get everything delivered, booze, cigarettes (not that i smoke anymore, but some people still do!) groceries, even your local coffee place will send a guy out with coffee and facturas. I took me a while in work to understand that everyone orders their food to be delivered to the office, almost unheard of in Ireland unless you are working late and ordering pizza. There is generally a queue at reception here for deliveries of pizzas, milanesasa and whatnot.
Anywhere you go anbd are buying something slightly bulky, just ask..."ustedes hacen entregas?"...99% of the time they are happy enough to do it for a small fee and a wee tip to the delivery driver.
The only caveat for supermarkert deliveries is frozen stuff, also careful with the meat you pick and no fish in my experience. Remember, if you aren't going first thing in the morning (unlikely if you're working) it'll likely be next day delivery. They pack it in the line...it will sit in a coolbox with cooler packs so frozen stuff is out. Not too worry, your local ice cream store delivers! It can even go beyond delivery, we bought a lot of food for a prty for around 15 to 20 people recently for a panaderia..(migas, other fancier hot food) and for the princely sum of 200 pesos (just over 20 usd) they offered us a waitress. Totally brilliant, she came round and served drinks, brought food round..she was a shadow. You can find whatever level of service you need in terms of delivery and a bit of extra help.
For me, life savers have been:
1. SUBE card...goodbye shuffling around for change!
2. Ferias itinerantes (hmm...moveable markets?)...finally good quality chicken, pork and fresh veg (get up early ish at the weekend and shop in fresh air). Best prices and to me it feels better buying here than in the supermarket. The eggs are nicer and fresher too. Check this website and have a look at the one near where you live:
http://www.buenosaires.gob.ar/areas/espacio_publico/mantenimiento_urbano/ferias_mercados/ubicacion.php?menu_id=23759
3. Finally, i notice these are fairly food focused, maybe it is too close to lunchtime! ,....i recommend reading this food blog for restaurant advice. Very well written and really useful -
http://pickupthefork.com/
Once you look hard enough you realise there is a lot of average rubbish on sale in the supermarkets, I find myself now with a list of go to places which deliver or have better quality food, really tasty stuff. Same with pizza, 90% is pretty average, but if you look you can find something pretty close to what you like if you adapt your tastes a little.
Outside of the local mass produced muck (Quilmes!), some of the local beer is really good. I like Schneider and Isenbeck for the more commercial offerings, but the micro brew stuff can be great if you find a good one.
Sorry, long post...too close to lunch time and getting toward the weekend so my mind has turned towards beer and nice food!