Simplest way with minimal gear: A decent 11'rod with a bit of back bone, 6/8lb line well greased with line floatant, a size 4 hook, and a good supply of crust from a new loaf and a bag of softened Chum Mixer to act as an attractant (all of which can be carried in the landing net). The chum can also be used a bait on a smaller hook...
Walk around your water with some polaroids til you see some fish or you see good rises. Cut a 2" cube of crust, thread the hook through one side and then pull into the opposite edge. This will stay on for ages but believe me, when a fish takes it the hook will pull (mainly) into the bottom lip and hold.
With this simple method you can sit on the bank side, fire out a few Mixers, and just watch for the fish start to nose around the free offerings and eventually your floating crust as they surely must if you have surface feeding fish on your water. You can gently lob your bait close to bushes ot overhanging trees and if you watch the surface drift you can get the crust to float under the bushes where the carp sit in undisturbed comfort.
This is, to some extent, an old fashion way of carp fishing and one probably superseded by 'new' methods these days but for me, that's it's beauty as it isn't used very often now.
I have had some really great days, great for the simplicity of the method, and landed many, many very good fish while others sit by several rods staring at indicators that rarely move. It is very basic with minimal gear required and works best in the early/late hours before others arrive on the bank. Having said that, I have also taken good fish at midday, in bright sun when good fish come close to the surface and jusr meander around taking bits from the surface. hence the use of the Mixer!!
I cannot recommend this method enough on waters with good shallows particularly and it's well worth a go for the cost of a decent 'Tin loaf' sold by most supermarkets.
Oh, one last thing; A good pair of scissors are handy to cut nice neat cubes of crust which should be square for better casting awhich should have plenty of crumb attached...
ps well worth a go and very exciting fishing, either in the margins or 30' out in the middle...Yes, a lump of crust can be cast s good distance just with an underarm lob!!
pps The big hook mentioned makes it very easy to push through the bread and on some occasions I have gone to a size 2 with larger cubes...the fish don't mind one little bit!!!
ppps On one occasion I was invited to fish a 'hard' water for carp. I looked at the good shallow margins and surrounding cover and took a 20lb fish just by pushing the rod/crust through the bushes and dropping the cube on the waste 2' from the bank. All hell was let loose but it worked a treat.........