Before the approach, a general overview of the approach chart:
Identity the correct approach plate eg YSAA RWY 26 NDB/DME circling using xxx NDB, yyy DME
Set up radios & navaids: Tune, Ident & Test, sequence to use if multiple radios or standby's
Approach entry eg via a hold, which sector entry / any limits in the hold eg DME, time, altitude; DME arc; min altitude(s) for this part etc
Plan view of approach eg outbound, LEFT teardrop turn. Any limits eg DME, time, cross bearings needed
Profile view: Step down alts, limits --> intermediate limits, MDA etc
If visual: What should I see, where should it be, circling restrictions, what to do then...
If not visual: Missed approach procedure
Finally, any notes / gotchas / other vital info
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During the approach:
T next TURN direction TRACK (or hdg) & TIME (or DME limit)
A next limit altitude, MDA or DH. Also includes advisory alt/Dist if available for this approach
A navAID serviceability eg flags away, AUDIO still monitored if NDB, DME ACTIVE if required for the approach.
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The TAA checks are short term items to ensure the next impending turn, intercept, descent etc is being attended to.