Background: 3rd timer, No Finance background, Work exp in IT
June-07 - studied for 30 days - flunked ( used only schweser, did well in FSA and Ethics >70)
Dec-07 - studied 20 days - flunked again, result was worse than 1st time only Ethics >70 couple in 50-70 ( quant, FSA ) rest all below 50.
Jun-08 Studied 40 days - cleared with most sections above 70 ( Quant, AI and Derivatives between 50-70)
Used Schweser only. Did questions at the back of CFAI for ( FSA, ECO, FI )
For Ethics, used CFAI and schweser.
IMHO, if you are stressed for time:
1) Read through Schweser and do all the questions at the end of each section
2) After each Study session, try all the questions at the back of CFAI textbooks ( do this for the heavy weights at-least)
3) Re-read entire schweser + questions ( make sure you understand the underlying concepts this time )
4) Take some sample tests to time yourself ( I didn't take any and suffered in exam ( missed simple questions ))
Don't ignore quant even if you have a maths/engineering background, its lengthy but high-scoring (I made a mistake).
Try to refresh everything once in final week, helps a lot ( again this is only for those who are stressed for time, if you start now and can spend on an avg 2-3 hrs daily, you will get enough time and you will be quite clear concept-wise)
All the best!!