I'm a T1 and low carb. The idea is that you need less insulin so you will make smaller mistakes - smaller highs, not so low hypos and both less frequently. I've been low carbing for a year. Since then I've not been in the 2s and don't think I've been in the teens either.
Managing your levels whilst eating out is easier, just go for whatever has the lowest carb content. Same with drinking, just drink the low carb stuff. I never used to be able to maintain perfect levels whilst eating and drinking out, but I can now.
Best place to start is to buy Richard Bernstein's Diabetes Diet book. Bernstein is a doctor and also a T1 and a low carb advocate. His book details the ideas and contains recipes. Its a bit of a rant at times and his carb prescriptions are a bit strict, but the philosophy is sound: avoid the foods you associate with carbs.
Since low carbing my HbA1c has dropped from the mid 7s to the low 6s. I'd thoroughly recommend it if you want to, but for whatever reason, can't reach the 6.5% target.