I had a cup of coffee in the morning every day (once I was done with m/s) with my last pregnancy. Occasionally I'd have something in the afternoon, too. That's basically what I've done with BFing, too, so I figure I'll just keep up with that (as long as I feel ok!).
I usually drink 1-2 cups of coffee a day. As soon as I got my bfp I gave it up, but this morning I couldn't resist a cup of decaf. I'm going to do my best to avoid it but I'm not going to beat myself up if I need a cup here or there.
I normally drink about 8 cups of tea a day, so I have been cutting back. I haven't missed it, because by grumpy tummy is not interested, but I have been drinking a little so as to avoid the horrendous headache I'd get if I quit cold turkey. I got it down to one, and now I'm just drinking one or two ginger-lemon green teas per day. I'm quite happy with that.