What I do is to build my menus by starting with the main course for dinner. Then I add breakfast, and end with lunch. This way, if I start to get too close to my limits, I find it easier to adjust things as I go. Also, I aim to be a little short across all macros as I build the menu plan, so I have a little wiggle room.
And for what it’s worth, my readings since I started this (also back in mid-Oct) tell me that while keeping at or below the carb limit is important, there is a (little) little wiggle room with fats and proteins. Excess proteins can be converted to glucose which negates the goal we’re trying to achieve, but an occasional extra protein won’t derail the train - I just don’t want to make it a habit. Fats, on the other hand, are the ‘new fuel’ so if anything, I’d rather be a little short of dietary fat (eaten) because if I am short, my body makes up the shortage by burning stored fat (which is how we lose weight and achieve health benefits).
I hope this helps, and keto on!