Here's a simple set-up using a 'chod' rig. Called a 'naked' chod, as there's no leadcore or tubing used, (which can be handy for certain waters that ban them) it's also gained favour as a more subtle presentation as the chod is mounted on your main line, which is much less visible than most leaders, especially when fished over clearer spots. It's best used in conjunction with a fast sinking main line.
1) As this isn't a seperate hooklink you'll need to set up your rod and have your mainline threaded through the rings. Then take a rig stop, I've used a Gardner Line Stop, and slide it onto your line.
2) Now slip a 4/5mm bead onto your line and over the line stop as shown. It needs to be tight enough to hold its position, but able to pull off under slight pressure in case of a crack off or line break when the fish needs to dump the lead.
3) Your chod rig is next, I've used a pre-tied one from Gardner, a size 8, slide it on up to the bead.
4) Follow this with another line stop and bead to trap the chod on your line.
5) Lastly slip a small length of silicon tubing, or helicopter sleeve, on your line then tie on your chosen lead, a palomar knot is usually best. Now slide the tubing/sleeve over the leads swivel to tidy up the finished rig.
6) As a final bit of fine tuning, wrap a small piece of putty around the chod swivel. As there's no leadcore this will sink the chod slowly to the lake bed, giving you perfect presentation.
Remember to adjust your beads, with the bottom bead needing to be around 20cm up from your lead to stop any tangles.