Below I linked the spreadsheet I used to lose 35 pounds. You can download it and save it to Google Docs or convert it to Excel. Keep it on the cloud so you can enter data with your phone or tablet.
Use it in conjunction with something like MyFitnessePal.com to make it easier to calculate calories.
Weigh in first thing in the morning and watch your progress. Your weight is pretty random so it will fluctuate around your target but should keep roughly the same trend.