Don’t increase your bet when you are losing because it will just amplify your loss immediately once you are in bad streak. Always test the water before you increase your bet. 
Assuming I have $20 to be used to bet for the week. I want to go for 3 rounds. Anytime I win, I will stop gambling for the day. I go for 3 odd games. Fir 3 odd games
I bet $5
If I lose, I will bet $10
If I lose I will bet 20
This is called martingale which we all know and can be used to win. Anytime I win, I will stop playing. If I lost three 3 times, I lost for the week, but the chance that I will lose three time is very small. All lost after a single winning will recover the losses and there would be more profit.
The disadvantages are that you will nit be able to stay long to gamble and also if you list more, the gmhiger the loss in the next round. It takes discipline and responsible gambling.