Are those price prediction tools worth anything?
Marginally. The reliable part is that prices rise close to departure and dip on midweek flights, both of which you can exploit without a tool. Set a price alert, book when it is acceptable, and stop watching, because the regret costs more than the difference.
Tool steps: 3 (reasoning summary, call to python, execution output)
rows = run_sql("EXPLAIN (ANALYZE) SELECT ...")
print(rows[:3])Seq Scan on events (cost=0.00..812431.00 rows=41203122 width=16)
Rows Removed by Filter: 38996878
Planning Time: 0.214 ms
Execution Time: 11842.663 msAny approach to jet lag that actually works?
Shift the light schedule, not the sleep schedule: get bright light in the morning at the destination and avoid it in the evening. Melatonin helps at small doses taken early relative to the new night; large doses mostly make you drowsy at the wrong time.
What would you skip entirely?
The reporting layer, until something forces it. It is the part that feels productive to build and the part nobody opens twice.