Corner analysis means that you check whether your circuit works when you take into account manufacturing tolerances for devices, temperature range, variations of external signals. It does not optimize your design, it is thought to check whether your circuit will work in real life over the possible variations of these parameters.
Typically you consider min/max values for resistors, capacitors and temperature and 4 corners for the MOS transistors: ff, ss, fs, sf.
f stands for fast (highest drain current for given device size), s for slow (lowest drain current). The first letter is usually for the NMOS, the second for the PMOS. tt stands for typical-typical, i.e. nominal drain currents for N and P.
Have a look at the following guidelines:
http://www.vlsi.iitkgp.ernet.in/~animesh/ana_flow/analog_basic_precau.pdfSome of the RF guys in this forum can certainly give some info about what to consider for bipolars and inductors.
Paul