Personally myself, started at 17/18 now 41 been at it all the time, now selling
the rounds been as mad as Three point five large a month but lost some big earners due to shop cutbacks, ie KFC, Mcdonalds, Waitrose..
best way to start in this business and to make it pay is SIMPLY just to stick at it WHATEVER nature and your personal circumstances throw at you.....
i had some really awfull winters ie 1988 sticks in my mind, God it was freezing that year for about 4 months, and i was still out in it...bills to pay :
also dont be disheartened by customers 'coming and going', i could tell you stories of clients that have fased in and out for the last 20 years through housemoves and God knows what other circumstances....
if you are good, and i mean GOOD, you'll get work, that simple.
Keep your face in public, don't rip no-one off, be polite, listen to your customers monthly winging with a smile on your face and you'll be fine, trust me.