Drig-Drishya-Viveka : An introduction to Self Knowledge
Recently I made a mention of "Aparokshaanubhuti" by Shankaracharya. The book with 144 stanzas gives the reader a glimpse of the steps to be followed, if one wants to pursue "Self Knowledge"
There's another smaller text which Achaaryas consider as a first step in one's progress towards self realization.
Using the following link we can watch an excellent introductory talk on Drig-Drishya-Viveka given to an august audience in Laus Angeles under the auspices of Shivanandashrama, few years ago: