This is what I do: first of all, I plan my racking days to fall really close to the brewing days. When I rack from the primary I leave the yeast on the bottom of the fermenter, then pour it into a mason jar, cap it and stick it in the fridge. I take it out an hour later and decant the liquid, then cap it again and leave it in the fridge till brew day (usually a day or two away). When I have my wort chilled and aerated I take the jar out, open it, decant as much left over liquid as I can, swirlt the jar to suspend the yeast and pitch the whole slurry into the wort.
There you go, simple, easy and works really well!