I agree, don't gamble where the money you will spend is you can afford to lose. Just gamble with your spare money so if you lose it is not a big deal from you and you can sleep peacefully that day. If you win that time don't be dissapointed that you just played with small amount. You'll just probably lucky at that time.
Yeah playing gambling in small amount is a good strategy because you can play several times and you can win and you can also lose, you can experience both even in small betting because once you've bet big amount you can possibly lose in a short time.