I'd agree with you, I'm in a similar situation to MelonBar and it's pretty damn frustrating. What do you find is a more efficient learning method?
It's so personal that I hesitate to even suggest other things. I just realised quickly that I gained almost nothing by rewriting and summarising a lecture.
Me, I do these things...
1) Use lots of different resources, and because I'm an aural learner, these are usually video/iTunes U collections in conjunction with lectures. I use Khan Academy and Coursera a lot but I understand that this approach will get more difficult as content gets more specialised in later years. I basically just read and watch as much stuff as I can from as many different resources as I can, and then follow it up by...
2) Doing as many related questions and exercises as possible, and then...
3) Explaining the concepts aloud to a teddy bear.
Basically I suck at rote learning, so summarising a lecture and then trying to learn the points just doesn't work for me. My methods are dorky and probably just as time consuming but at least they are effective for me. At the end of the semester, I have no notes apart from the lecturers original slides and an exercise book full of worked answers for exercises.
I've just noticed that almost everyone at uni on AN seems to be preoccupied with lecture summaries............. I'm sure its a great way to learn for a lot of people but I also wonder if maybe it's just what you got taught in high school or something? I don't know hey....
EDIT: Yes I realise that most of you are life science majors. I'm not trying to tell anyone to stop doing lecture summaries. I'm just trying to say if one thing isn't working for you then maybe try something else. Hey, the teddy bear thing works great for basically any major.