How about you? Are you using a similar method, or do you approach it differently?
It is pretty much the same in my case, the being the main difference the way I like to distribute the budget through time. You call about a month for one's budget, but I prefer to distribute it in seasons or cups (in the case of Football). For example, if there is an important event, like a World Cup approaching, then I set up a maximum and a minimum amount to my budget and I start to bet keeping in mind such figures for the rest of the cup, take a glance of the first matches and do a basic relation between the number of possible matches I may be interested in and the money I have available.
In the case there is a match which I find very easy to predict (one which has very low odds for the favorite), I dedicate a higher percentage of the budget to such match, not much, but higher in comparison. So I go on with that strategy during the cup/league, I feel the season is a success in the case I make between 30 and 50 percent of profit.