Most of the time when I bet I use a strategy called 10 percent strategy, wich means that with each loss I increase my stake by 10% rounded to the nearest non-zero bet unit and with each win I decrease my stake by 10%. After I have broken even, then with each extra win, I return half back to the lowest bet.
It is pretty easy to use and it works very good. You've probably heard about this system before but I've added some improvements to it.
It is very simmilar to the D'Alembert strategy but only a bit easier because for example when you reach £100, you'll go up/down with £10, at £200 you'll go up/down with £20 and so on. It's a pretty fair strategy I believe. I hope you like it.