Dadanawa,
A spreadsheet??
I do not know what job you have now but you should consider being an approach designer or a nav data base coder.
From a 'planning' point of view, i.e. on the ground before flight, I am with you 100% but when it comes to 'flying' this stuff, I tend to take the uneducated 'nike' approach and 'just do it'.
A bit too flippant I will admit but I think you get my drift.