i use sidetrack for setting up various corner functions. the stock drivers however also allow u to tap and click on the touchpad, u just need to set it up. u also may want to tweak the acceleration of the cursor/touchpad in the system preferences. w/ sidetrack i have the lower right corner setup to be my right click. i rarely use the actual trackpad button, and usually just use the touchpad to do my clicking.
also, be mindful of the differences in the OS. with windows u can click on any function within a window in the background and it will activate. in OS X u can click on the "stoplight" buttons (minimize, etc) on the top left of each window if the window is layered in the background, but for anything else u will need to click on the window to activate it before any of the buttons/links within the window will become activate. this is to insure that u don't accidentally click on things u don't intend to. in sum, with those instances, u aren't missing your clicks, you're just following the structure of the OS.