As a fairly long term low carber, most of the time , my shopping tends to be fairly conventional. In that I buy/cook the usual pasta, rice, potatoes, bread - I just don't eat it. So if I'm doing a 'meat and two veg and potatoes' kind of meal, I just have extra veg and no potatoes. If it's curry (we have take away every Friday) then I just have the curry and no rice/poppadoms/naan), and if it's pasta then I either don't have any or I may substitute thinly shredded, boiled white/green cabbage for spaghetti. Trust me, it works surprisingly well! Makes you realise that pasta is really just a carrier for a sauce.
You're likely to find breakfast the most difficult - it seems to be an issue for most who are new to low carbing. Eggs will be your saviour.
I eat, variously, poached eggs, boiled eggs, scrambled eggs or an omelette occasionally - with cheese. I don't have bacon and eggs very often as it's not my favourite thing, but every now and then I may do it for a change. I sometimes may have just one hard boiled egg if I'm not very hungry.
You can have yoghurt and berries, as Katisha says, but beware the carb counts and make sure you weigh/measure what you're eating, otherwise you can eat a lot of carbs without realising it.
otherwise, the other thing to do for breakfast is to not think about it as a meal that requires 'special' foods; eat stuff leftover from dinner the night before, for example. Or go Continental, with sliced meats and cheese.
My dinners for this week are:
Yesterday - roast chicken with roast veg, (leeks, peppers, courgettes and carrots (quite carby so I avoided those), and salad with vinaigrette.
Today - what we call 'Big Salad'. Not sure it's really the day for it! This will be: a green salad with vinaigrette, stuffed hard boiled eggs, tomatoes with mozzarella, grilled peppers in vinaigrette and - for the rest of them - freshly baked baguette.
Tomorrow - spaghetti and meatballs with tomato sauce; I will either have cabbage just the meatballs. Tomato sauce will be homemade, and is just tinned tomatoes, olive oil and garlic. Meatballs are homemade and are minced beef, onion, chilli, garlic and a red pepper, all whizzed up in the processor and then baked in the oven. I will serve this with broccoli and possibly salad.
Thursday - pork steaks. Not sure how I'm cooking these yet; DS1 loves them baked in the oven with barbecue sauce, but there's quite a lot of sugar in that so I suspect I'll probably just roast them in a more boring fashion! This will be with potato wedges, for the rest of the family, and whatever veg/salad I have left in the fridge by then.
Friday is takeaway night, when I try to be as good as I can (usually succumb to a bit of naan bread, although I will try my best not to this week!).
Weekend lunches I find the hardest, as I often just make sandwiches or buy 'nibbly bits', such as spring rolls/samosas for the rest of the family, and then it's too tempting for me. One way round this is to skip breakfast and make brunch - always a good excuse to serve up bacon, sausage and egg.
This is the low carb site that I have used for a long time and there are lots of good recipes on here.
And remember, one of the joys of low carbing is that you can eat fat, so cheese is allowed! (Just don't go too mad ...)
Hope this helps!