If you haven't played at Cyberslotz yet then now is the best time to do so, as there is a risk free way to make a few quid.
Cyberslotz have a nice and easy signup bonus offer. Basically you deposit £10 and they give you a free £5 casino bonus and a free £5 bingo bonus. You just have to wager the casino bonus of £5 once over on SLOTS ONLY before you can withdraw and naturally the same with the bingo bonus.
As any slot machine is a game of chance the recommendation is to play "Ice King" 56 times @ 9 pence a go (£5.04) to release the bonus. You should win something on virtually every spin which minimises losses, meaning you should be able to retain an average of £3 - £4 of the original £5 bonus and it will only take ten minutes to do this.
Once you have played the £5 over, you can withdraw your original £10, so this is a risk free go on the slots. The worst case scenario is if you lost EVERY spin you would be 4p down!
Plus you have £5 to play on bingo. There is no real strategy for bingo I am afraid. You can either go all in and see what happens or just buy the minimum amount of cards allowed (3) for each game so you have more chances of winning as you are playing more.