A lot of people seem to list motivation as a problem.
Think on this:
If you had a boss who wanted you in at 8.30 your motivation would be to get there for 8.30 or risk losing your job.
Since I've been self-employed I've made it my business to be my own task master.
It's always tempting to look out the window at 7am and think "it looks like rain, best I stay indoors and perhaps venture out mid-morning if it doesn't rain".
If you had a boss and suggested that he'd say: "OI!!! get yer lazy arse here and OK if it rains then you go home".
For myself I find Cheltenham & Gloucester a good enough motivator
...and BT and EDF and Sky and Thames Water and Wandsworth Borough Council and Black Horse Home Insurance and and and and..the effing list is endless