Delay a clock to give time for the input to settle?
One of the easiest ways to add a delay is with gates themselves:







simulate this circuit &ndash; Schematic created using CircuitLab

If you have some gate IC's laying around, you can use these to add a delay. With two NOT gates, lets say the delay is 10ns, with 2 of them, you'd get 20ns. With 4 not gates you'd  have 40 ns delay.

An AND gate can also be used if the inputs are tied together. 

If you needed delays greater a micro second then that might not work, because you'd need a large amount of gates, a one shot 555 timer might be better.