Here'e another tip for you....
if you find a scent you like and then it's retired but you can still get samplers (votives) then you can also use these as tarts..... pop a knife under the metal button at the base of the sampler and prise it away from the candle, pull out the wick totally and then cut the candle lengthways in half, you can now use this as a tart.
We have some fragrances that are retired and certain wax forms always sell out before others so it's always good to know that you can do this.
I tend to use large jars a lot, but I don't always burn them all in one go, I have got a few at home that I can choose between dependant on my mood, I have a Happy Christmas jar that I have been burning for the last 3 years!