When flying in Africa never accept a 'direct to' unless you hear the majic words 'radar' contact. Insist on being safe, fly the airways.
Slow taxi is a really good one. Don't anticipate a incline by applying power early to maintain speed, wait till the groundspeed drops to 3kts then use thrust as required to re-achieve desired taxi speed.
Don't accept any 'cleared for immediate takeoff' departures. Not the safest again.