I am in my fourth year now and agree it is still tough going at times, i did have a considerable motivation to ensure that it worked though, i left school and went straight into the family business so left school with no formal qualifications, i grew to hate that job so looked around for other ways to earn a living and in so doing stumbled on this forum which was a life saver.
I ended up being sacked when i lost it one day, prior to this i had been doing the NCCA thing, practical experience with a couple of carpet cleaners and research for running a business and read a lot of books on marketing, the driving force to make it work was fear, on the day i got sacked i took out a loan over the internet for £15,000 risky i know, i just didn't pay it though, the mortgage was my priority so the loan could wait, i have this year paid that loan off in one lump sum, so quite happy with that.
I spent about eighteen months doing research before i took the plunge, helped tremendously by the people on this forum, i honestly could not have done it without their help and guidance so you have already done the right thing to get your own business up and running
PS Simon's advice is spot on