Think about what is realistic for the type of work you do. Warning - don't be hemmed in by thoughts of what the job/workplace has traditionally done - this is an opportunity for some new thinking. However there will be some limits - for example you will not be able to work at home if you are a bus driver! You can't ask to come in at 9.30 am every day if it is your responsibility to open up (although you might want to look at changing your responsibilities). Having a clear idea of the limits to any request will help you decide what you should ask for and encourage your employer to take your request seriously. Don't damage your chances by asking for something which is clearly not going to be workable.
ACTION POINT
Note down any limitations to the kind of flexible working you could do in your job (remember - you could propose changing some aspects of your current job)