please show me your irrigation systems

I'm wanting to revamp aspects of my garden and irrigation is at the top of the list. I live in a hot humid climate which can have long periods of no rain. We have about 2400 gallons of collected rainwater for irrigation.

My current method is to use a hose from the rain collection tank and hook it up to a "leaky" pipe, which I move from bed to bed. Not only is this time consuming, but also I must lay it on top of my thick leaf mulch, so I lose some of the moisture to evaporation. Plus, it takes a lot of water to penetrate the mulch and soak the soil. I need ideas for improving on that!

I would love to see how others have dealt with irrigation. So please, show me your irrigation systems!

mine is even worse- a hose coming out of a large rain barrel. It takes a lot of time. I have scouted out old leaky hoses thinking i'd just be able to leave them on the ground to drip but either there isn't enough pressure or some other finicky problem. I'm hoping someone else has some good ideas!!!