I have a spreadsheet on my computer. I weigh myself every other day and, as I am on the 5:2 diet, I weigh and count calories assiduously on fast days and less assiduously on non-fast days. I also now have enough experience and knowledge of calorie values to make a reasonable guess at calorie content for meals I eat out.
I have also noted down the calorie value of dishes I cook regularly so I know that, providing I am strict over portion control, how many calories there are in a home made spaghetti Bolognaise, for example without having to do calculations every time I make it.
I note on the spread sheet, my weight and the calorie value of each meal with a daily total. I also record exercise, usually my daily walk or a swim.
I now find that if, like at the moment, my weight is sticking I can look back over my spread sheet and note that I have had sticky periods in the past but this has usually been followed by loosing several pounds over several days, so I do not lose heart easily.
It has really worked, I am 21 lbs down with 7 to go. All my post menopausal weight gain has gone and I am nearly at the weight always considered as acceptable for my height in the past.