christmas challenge

I'm sorry i havent posted lately..
since advent is starting next week I decided to start a christmas challenge - for 4 weeks.
My goal is to lose at least 5 lbs every week, 20 lbs alltogether.
My f'ing scale is broken right now, but I'm going to buy a new one on monday.
My plan is to eat 3 little meals each 200 cal max (= 600 cal as the daily limit).
I hope to keep myself from eating by beeing as buisy as possible. I am planning to stay in the library all day, working for my assignments. This is by far my best strategy to keep myself from eating.
I also set up a work out routine, which is going running in the morning for 30 to 40 minutes 3 times a week.
I am going to do yoga also 3 times a week. Additionally I'll do muscle training 4 times a week.
I am really looking forward to just not thinking about food, having my meals planned out for the hole week and losing weight.
Since my scale broke I am going to post my start weight for this christmas challenge on monday.
I'm thinking about buying sugarfree energy drinks (even though i hate the taste of energy drinks), maybe i should stick to diet coke. I am a little worried about my concentration while studying. Any tips or suggestions ladies?
Overall I am trying to do this in an as positive as possible mindset. This is also a good strategy for me to get through this and stick to my plan.
I am just gonna concentrate on myself, not letting anybody or any negative emotions interfere.Point.
I'll keep you updated.
Have a good weekend, all of you!
xoxo