The 300 Bet Challenge :

Bet on a (1.02) or (1.03) selection, I  mainly use the under 6.5 goals market on betfair as most games very rarely have 7 goals, you could use anything you like. Even in-play bets can be used. If your bet wins, use all of the winnings on the next selection.

This is very slow at first but once you get past a certain number of bets it gets more interesting.

Starting with £10 and betting on 1.02 or 1.03 bets, (using an average of 1.025) this is what you should expect to return:

25 bets - £18.54
50 bets - £34.37
75 bets - £63.72
100 bets - £118.14
125 bets - £219.02
150 bets - £406.05
175 bets - £762.79
200 bets - £1395.64
225 bets - £2587.44
250 bets - £4796.96
275 bets - £8893.30
300 bets - £16487.68

Sounds Easy! Give it a go guys...

This will take time but if your prepared to take more of a risk and choose higher odds then the process is a lot quicker and number of bets required is a lot less but the risk is higher.