heres my strat; read the questions in the reading time, and figure out the easiest ones
go through the whole paper doing all the easy ones, that you know you can do without much thinking and not much time
go through the whole paper 2nd time around doing all the questions that are able to be done with a few mins of thinking and solving, ones that will take up some time, but you know how to answer it
lastly go through the paper 3rd time doing all the difficult questions