I never set time scales for goals, you never know what your body is going to do and if you weren't to hit a certain weight by a certain date you could end up feeling disappointed an no one wants that!
My mini goals have been both weight and non weight related. The non weight related ones I 'celebrate' with a nice SW pud or something that feels indulgent. These goals are things like - fit into next size down, incorporate exercise, shorten length of time to cycle to x, etc. To me these have been just as important as the weight ones.
For scale targets, again it's been different things and as well as the standard half a stone, stone, 1.5 stone, etc. One of my targets was to get under 100 kilos - that seemed like such an achievement!
My current targets are to get to my 6 stone (3lbs to lose) and to get my BMI into the overweight section (10lbs to lose, and would also give me my 6.5 stone award).
You have to be realistic and true to yourself. If you have had a bad day, fine, leave it at day rather than turn it in to week. If you had a bad piece of fruit in the bowl you wouldn't throw the whole lot would you?? (well, some might but that's just being picky
). And if you think that 'one biscuit' that just slipped in doesn't need to be counted..... Er yes it does. No one else is affected by your weight, only you.
Hope I haven't bored you to tears
and that you feel better soon - weather is doing my head in too! Xx