how do u connect leads from diodes?

What would be good ways to connect the little metal leads from resistors, diodes and l.e.d.'s to a wire?   I assume solder but how exactly do u solder these leads to a wire of any gauge?  Then how do u insulate the bare metal leads ?  Shrink tubing, is that the only way?    What does everyone here usually do?     Thanks

I'm guessing that your would put the shrink tubing over the entire resistor to make sure the leads are entirely covered? 

Also though how exactly do you solder the leads which are stiffer then the more flexible wire?