Maintaining a Garden in a Busy Family Home

I love our garden especially in summer but it takes so much to keep up with all the maintenance. With busy family life I find it hard to keep on top of all the housework never mind keeping the garden tidy too.  Our back garden is quite big and on four levels because we live on a hill and the front garden has a large planted area too.  The old man that lived here before us was an avid gardener and put a lot of work into making the garden a wonderful place but he was retired and lived alone.  There were a few years when I did the bear minimum as with the boys being so little and needing all my attention and then a couple of years when I spent all my free time studying, there was no time for me to do more than cut the grass and do a bit of weeding.