We all know it too well, that moment when you've finally made some headyway in your training program, you've reached a few goals, your nutrition is solid, you feel great about yourself and what you've accomplished!
Then it happens, you go on vacation, you miss one day at the gym that turns into five, and all of sudden you think your body might have forgot how to do a squat. But more importantly you realize that you have no idea what's going on with you because up until now if you missed you workout by a few hours your day was totally off, so how can you have possibly missed an entire week?
It's easy to get out of the groove, so what can you do stay there, even when things go a little helter skelter?
First off, don't beat yourself up, the negative energy will kill any momentum that might lingering in your path.
Second, start back on your plan right away. Don't wait for next week to start, don't wait til the weekend is over, just make a concerted effort to start the moment you realize you've fallen off the wagon.
Once you've gotten back on track be sure that you aren't beating yourself up, give yourself a rest day, reward yourself for working hard (within reason) and get ready to conquer the next obstacle. You've probably faced much worse in life than falling off the wagon, so pick it back up and get ready to stay on track.
Look at it this way, you've devoted a lot time, effort and energy to make it to where you are, so why waste it on simple moment of weakness. Take it back and make it work for you, mostly because you can.