Be ruthless. 2 sides of A4 max and leave out the jargon
Be
sensible and realistic.
One A4 Page.
I sat alongside an RAF Loadie on (what was then called 'resetlement') once and he had at least 5 pages in a folder. Ridicularse!
Good luck on leaving the Service, for what it's worth here is my advice:
Don't worry about those 'I took part in Operation Provide Comfort' -type certificates I once saw a SNCO waving around, (just before putting it into his 5+ page portfolio).
Get some business cards made up: Name, email, telephone number. It saves scribbling down details on paper when you are networking.
Forget the Military, from now you are a civilian looking for a civilian job, spending the next few months in the RAF or whatever, start thinking like a civilian, not an Officer. Of course you may have to play the game slightly here depending on who you want to work with / for.
I would second what
airborne_artist has said apart from the golf bit.
Also, most people know ex-mil. have 'done stuff' but in some cases it can have the opposite effect than is desired, it can intimidate.