Keep Your Eye On The Goal

A lot of people have a specific goal that they want to achieve. Unfortunately that specific goal changes every few days. Some people have lots of goals that they've been striving to achieve for years.
Often the thing these groups have in common is a lack of any meaningful achievement.
The first group never achieves because they never spend enough time on their stated goal.
The second group because they have too many objectives to ever focus properly on achieving just one.

Goals must be simple and specific: "I want to bench 120kg".
Goals must be measurable: "If 120kg goes up, I did it".
Goals must be achievable: "I am physically capable of doing this".
Goals must be realistic: "I currently bench 110kg. 10kg more is possible"
Goals must be timed: "I want to do this by 1 Jan 2013".

There must be ONE main goal. And perhaps a secondary goal that supports it.
Primary Goal: I want to increase my bench.
Secondary Goal: I want to increase my body weight by 5kg.

Once the goal is set you need to ensure that you have a good plan in place.
Once you have a plan the really hard part begins. Endurance.
This is why it's very important to choose a goal that really resonates with you. Choosing the goal of weight-loss may be 'good', but unless it's what you really want (in the darkest recesses of your soul), you will struggle to hang in there.
Sticking to this goal for the months (years) that it will take is not easy. We live in a world of instant gratification. But, you can't always have it all now. Some things are worth working for. Besides, there are a host of good qualities you develop by hanging in there through the difficult times. Qualities that will help you to achieve the next goal. And the next.

Set it. Stick to it. Achieve it.