Use the search function. You'll find lots of threads about navigation techniques. On the day of the test you can use any acceptable method you like - they all eventually achieve the same result of getting you to your destination.
I favour 1:60 but have used others when appropriate, BEagle is a staunch advocate of 'standard closing angle' & nothing else, others like pre-drawn drift lines etc. As FFF says, they all have advantages & disadvantages. I'd suggest you should try to become reasonably adept at a range of techniques. They all add to your toolbox of skills, able to be used when appropriate.
Commercially, you wouldn't bother trying to get back on track unless there was some compelling reason eg airspace, terrain, weather or dearth of subsequent nav. features once back on track. Usually you'd try to track direct to the destination.