Rosetta Stone programs--both online and installed--cost a lot, with Level I in most languages coming in at over $200. Buying multiple levels will get you a discount, but this price still packs a big punch. And while the program provides you with a worthwhile immersion experience, it isn't instant; you have to put in the time required to absorb, a bit at a time, the nuances of a new language.
This isn't meant to dissuade you but, instead, to put the project you're about to undertake into perspective. You're putting out a lot of time and money to achieve what is, for some, a very difficult goal. So doesn't it make sense to plan ahead and maybe even reorganize your daily schedule, just a bit, to make the most of the already sizable investment you're making?
If you've purchased any version of the subscription-based online Rosetta Stone programs, the clock is already ticking: You've got a limited of time in which to make your investment pay off. Even if you're dealing with the installed version of the software, which isn't time sensitive in and of itself, you probably purchased it for a reason. Don't you have a language learning goal to meet?
If that's the case, get out your day planner and get ready to make a few commitments for the sake of your new project.
The one thing you absolutely, positively can't succeed at Rosetta Stone language courses without is repetition. The entire program is built around getting you to connect images with phrases in a new language through--you guessed it--repetition. So before you go any further, decide how much time you're willing to dedicate to Rosetta Stone and set it up to become a successful habit. You may need to fiddle with this schedule as you learn, through trial and error, what works best for you.
I recommend starting with three sessions of about an hour, spaced out through the course of a week. This gives you enough time to do the longest of the lesson units in one sitting or multiple short sections together, as well as providing a break in between to let any of the frustration that comes naturally with learning a new language subside. The longest of Rosetta Stone's lesson units are estimated to take most learners about half an hour, so you can always section this out into five sessions of half an hour over your lunch break if an hour is just too much time.
This may seem a bit ambitious, but remember--you're learning by the immersion method. Also, since you'll be completing entire lessons in the space of a week or two, if you have to take one or two days off it won't be a major disaster. But don't make excuses for yourself in advance; instead, recognize language learning as the priority it obviously is--you bought the software, didn't you?--and schedule yourself for "Language Tutoring" just as you'd schedule yourself for any other business meeting--and stick to that schedule.