"i've got Rant but never really used it apart from tracking to an NDB, so i'll give that a go"
you need to learn and go throughall the instructions, learn holds, hold entry, timing, tracking and arc's, VORs + procedures......
And SID's and Stars
+ go through the plates some you no where to find information and where it is on the plates
yes it can seen boring going through everything, in the self-tutor area, but trust me.. if you don't understand any of this. its some between £350-£500 an hour in a Twin, thats £6- £8.5 a minute. very, very costly........
an simulator is still around £250/£350 an hour too!!!!
hope this helps