hi there
a few years ago, when VAT was put on energy bills, people were prepaying to save the 5%, therefore there might be a possibility to prepare for some items, ie mobile phones, etc to make the 2.5% saving, keep an eye on it.
alternatively
what you could do is offer your regular clients, or contract clients, invoice them in december 2010, get them to pay in 2010, and then they get there work done at 2010 rates.
you then hold the money in a deposit account, earn a very little bit of interest, and carry out the work to the agreed schedule.
regards
martin