I am very lucky because I have a day job that motivates me every day!
Motivates me to build up my property portfolio and get out of the place as soon as bloody possible. A bad day at my work happens nearly every week so I get a constant reminder why I am moving closer and closer to working for myself in property.
You're right, that is a great motivater.
Only thing worse that a crappy job, would be a great job, you don't want to leave...and then you have absolutley no motivation at all.