Using those I linked.
Just get a piece of stripboard, perfboard, or whatever, cut the tracks if it's stripboard so they don't go the whole way across the board, insert the 6 pin ones in one side, an 8 pin and the offset pin in the other side.
The pins sticking out the bottom will fit in an Arduino. The headers ready to accept pins on top will be standard 2.54mm apart so you can put whatever you want on it.
Edit : Adding quick iPhone pic. On the bottom is a regular standard Arduino form shield. On the top is just plain ol' stripboard.
Standard straight 8 pins on the right, offset pins on the left. Now, those header sockets on top of the stripboard are all 2.54mm apart - and I don't need to buy extra offset pins each time I wanna test out a new circuit.