I believe more in short-term goals myself. I just like to see frequent and continuous progression and I'm happy and feel that as long as continue to take small, but constant steps in the right direction, the long-term will take care of itself.
That said, if you want to make some long-term weight-lifting goals, I would check out the following:
http://www.exrx.net/Testing/WeightLi...hStandards.htm
This is a link to some weight lifting "standards" for different body weights, lifts, and experience levels. For instance, the standard for a 123 lb adult female who is an intermediate level lifter (training for about 2 years) on the bench press would be 90 lbs. That is the 1-rep max. If you want to see what that weight translates to in terms of the number of reps you are probably lifting in your program, then you can use a 1-rep max calculator such as
http://www.bodybuilding.com/fun/1rm.htm
In the case of the 90lb bench press, that would equal approximately 68 lbs for 10 reps.
Therefore, you might want to set a long-term goal of reaching lifting 65-70lbs for 10 reps by the end of your first 2 years of training.
As Mel said, if you are going to be lifting heavy on lifts such as Bench and Squat, especially if you ever test your true one-rep max, make sure you have a reliable spotter. Also, it's not a race, if you try to progress too quickly you are probably going to get injured (which will also cost you training time and make you miss your goal). Slow, steady progression. If you can do one more rep each workout, or raise the weight minimally every two weeks, you should reach your goal in a safe, steady manner.