I would highly recommend this to your attention. It can save you hours of frustration in solving problems. Note, however, that not every part necessarily applies to every problem.
As per the discussion below, it is incumbent upon me to cite sources. This pdf was one I created from a combination of sources. The sole written source was Young and Freedman's University Physics. Other sources are verbal, from teachers, and my own experience.
For dynamics problems in particular, here is a tailored Problem-Solving Strategy.
Questions and comments should be posted here: