Congrats on starting IP and a new job adventure!
The BEST piece of advice I can give as far as staying on plan when you're busy is to PLAN AHEAD.
I have 2 boys (age 6 and 3), I work full time, my husband is a full time student and I run a baking business out of my house. So I DEFINITELY appreciate the busy! Here's how I handled my first two months while I got in the groove and learned the program:
-Plan your packets for the week ahead of time. I sat down with my calendar, my packets, and seven ziploc bags. I set up my 3 packets every day for a week - that way I just had to grab the bag for that day and go! It also helped make sure I was having the 2 unrestricted and 1 restricted every day and not getting them mixed up. I wrote an R in Sharpie marker on the restricted item so I wouldn't forget.
-keep an emergency packet in your purse, at your desk and in your car. You WILL need it at some point
-Look at your schedule a week ahead of time - know when you will need to pack your dinner, when you may have to look into eating out options, and when you need to have something in the crockpot because you won't have time to cook when you get home. Just getting into the habit of thinking about dinner in advance will help create good habits for now AND later!