Setting S.M.A.R.T. goals is the best way to get started with a fitness program.
S - Specific - write down and visualize what you are trying to accomplish - if it's losing weight - how many pounds do you want to lose, what size pants are you aiming for - do you want more energy? Write it down and get as specific as possible.
M - Measurable - make sure you track your weight and measurements (the best way to track) so you can see the differences and stay motivated. You can't track what you don't measure. Keep a log and it will boost your efforts and you won't be sorry you took the time to write or log things in a journal.
A - Attainable - you might want to divvy up your big specific goal into small attainable goals each week, knowing that once these small goals are all added together you will see the big difference that has been made!! You can aim for 1-2lbs per week.
R - Realistic - this one is very important because if you aim too high and miss the mark, it is super hard to focus on what you have done instead of focusing on the fact that you didn't meet an unrealistic goal. Set yourself up for success not failure.
T - Timely - Set a schedule that fits into your life and make sure the time you do spend on fitness is on purpose and effective - it shouldn't matter if it is a 60 minute workout or a 4 minute workout (tabata!!) as long as you are working out on purpose and with your goal as the focal point, you will see the change you want!