[DJ Sensei]

From a professional standpoint:

The optimal strategy is to build your bankroll to an adequate amount for whatever stakes you have the highest return at, and then cash out periodically whatever is above that level. This excess is your "salary" and you use it like you would with any other salary: it pays the bills and taxes, and then is either invested or saved or you use it on luxuries. (Spend it now, or spend it later). Of course one man's Rolex is another man's ability to eat nice dinners and sushi whenever he likes, fly across the country to visit friends, or go snowboarding in the middle of the week. We aren't all shipitholla ballas!

In addition to this strategy, the wise player would play both above and below his normal stakes periodically to ensure that he is in fact at the optimal stakes. The variance in poker related to sample size makes this more difficult, but you can at least get an idea if you look at your play and results objectively.

Also, no gambling, and no playing off of your A game whether it be 'for fun' or while drinking, unless you are spending your "luxury" money and can accept that potential loss. Thats probably good advice for any player. In poker you shouldn't mix business and pleasure.