In the profit first system, you can include self rewards under OPEX (operating expenses). You set the amount for the month and then can do whatever you want with it. That number can increase as debt is paid off and there is higher cashflow but always within a reasonable percentage. e.g. $50 is for MEEE until I’m debt FREEE :)
I cap my personal YAY MEEE fund at 10% per month - ONLY started that this year because I had the extra cash flow (so it's not a must to have it that high) and right now I have that money just sitting there being saved up for whenever I actually want to get something (I don’t spend it every month just to spend it).