This is how I do it, and it's just a matter of personal preference.
Reading time: Read THOROUGHLY through Short Answer.
With the titration questions, figure out exactly what is happening - a redox? an acid/base? is it a back titration? which is in excess? what exactly, reacts, with what in which order? what multiplies by what to get what number of mole? etc.
With the AAS/UV Vis absorbed concentrations, figure out instantly if there's a dilution that will screw you
With the organic pathways, try and suss them out (unless it's mass spec and you need a calculator to do it effectively)
Finally, theory based questions, just glance at and get the concept that it's talking about. This includes 'increased result, decreased result' - these are easy anyway, even on the KBT papers if you have a clear head.
Then, go back over the multi choice with whatever reading time is remaining, pinpoint the hard questions which use combined knowledge of mole ratios and chemical theory and leave them whilst scanning for easy definitions questions. Read every question, but don't hover over them.
THEN, in writing time:
1. Answer ALL short answer chronologically (should be 30mins to go by my usual times)
2. Correct all short answer, make sure answers aren't out by a factor of 10 (a common problem I face in almost every exam)
3. Add things to definitions which you look at the second time to make sure you understand the question
4. With the last 20 minutes, pick off all the easy MC (try to avoid skipping them so that you don't accidentally miss them later).
5. With whatever time you've got left, try and suss out the hard MC which you might have a chance at answering and try to logically evaluate how well you might be able to tackle them.
Finally, USE COLOUR AND ANNOTATE. I bring in three highlighters of different colours and it makes titration questions so EASY if you highlight each separate part in it's own colour - each chemical has its own colour and you can easily figure out mole ratios without multiplying the wrong things together.
NB: It is crucial to check over your SA questions as soon as you finish them because it's easy to lose track of time on the MC, and if you only have 5 minutes left you are only going to scan your answers instead of really checking through them. Remember, these are where your marks are, people!
NB: the above only applies if you do SA first.