Yeah, I am a bit fussy about this. I always take my planning seriously before travelling. Some of the pointers from my things to do are –
1- Choosing the right destination – Ah! Always confusing and the biggest task :)
2- Transportation & Reservations (Finding the best fare)
3- Learning the local language (common slangs & Words)
4- Accommodation Planning (Choosing the best alternative)
5- Lastly to check for some essential accessories like walking shoes, luggage, camera(s), money, travel insurance etc.