I don't really, sometimes I eat naughty things (like I have the shopping delivered tomorrow from Sainsbury's and I've got a packet of doughnuts coming which I'll be having 2 of (providing they're in stock as the shopping is picked, obv) but I don't tend to go over daily, nor do I have treats every day.
I do occasionally have shop bought sandwiches (I'm a fulltime carer and sometimes I just don't have the time or energy to cook a meal when it's been a bad day) but factor them all in and only go over by say 100 at the most on rare occaisons (but then there is 1200 between what MFP says my BMR is and what it actually is worked out with the calculation)