Do you know "What you will not be doing?"
Like if you know seo will make you riches. You will not do "ppc, ppv, mobile marketing, offline marketing, seminars, launches or anything else which distract you from seo".
Same is the fact with money. I have seen people "I want to be a seo guru. I just bought a product on apps development". What the heck? So, if you spend some money, just check it contributes to your current plan of action or not.
If you are into seo, do not even enter any other warrior forum section.
So, get a paper and write down "what i will not be doing today, so i shouldn't get distracted from my aim?"