From WIN-ipedia - information and strategies about winning

Lottery Syndicates - size does matter!

How not to lose

By far the best way to increase your chances of winning on any Lottery is to place more entries in each draw. However this can prove to be very expensive, so to reduce costs it is preferable to have a syndicate where there are several members to share the cost (and the winnings). Generally about 1 in 4 Jackpot wins are won by syndicates.

But what is the best number of people to have in a syndicate? Obviously the more people you have in a syndicate the better your chances are of winning, but have too many people in a syndicate and then the wins don't become worthwhile! But again this all depends on the lottery that is being played, if the Jackpot is regularly £5,000,000.00 then about 50 people in a syndicate is the ideal number, even if you hit the Jackpot you would still have £100,000.00 each, but if the Jackpot was only £1,000.00 then this would not be worthwhile.

So it also boils down to which Lotteries to play, probably the best Lotteries to play are the UK National Lottery and the Euro Lottery, the UK Lottery regularly has £5,000,000.00 Jackpot and the Euro Lottery regularly rolls over and has twice exceeded £100,000,000.00, also both these lotteries winnings are Tax Free.

Now it is fair to say that most people don't live in either the UK or Europe, but it is possible to play on these lotteries wherever you live, there is a company called Virtual World Direct that runs a syndicate system on both of these Lotteries and as long as you are over 16 years of age you can play wherever you live as long as you hold a debit or credit card.

They also run an affiliate program for their members which means that they can play for free, which is good.