Yes,
1,Get public liability insurance & employers insurance (to cover any casual workers you may use)
2,Visit your bank for business advice & set up an account, (I use an auto mated business account with barclays all free if automated systems are used but you pay 28p per cheque you pay in (larger commercial customers tend to pay by BACS).
3,Register with inland rev as selfemployed (sole trader).
Get an accountant on board unless you feel confident to do your own books & self assessment.
4,Get a 30day account at suppliers, but pay them promptly.
don't use cheap materials from B&Q or other diy sheds.
5,Never offer warranty on customer supplied materials (usually from a diy shed).
6,Be certious (spelt wrong ?) with a smile to customers (even when your feeling crap).
7,Put aside one day a week for pricing / looking at jobs.
Dress in smart casuals when pricing / measuring up jobs, not work wear (look like the boss)
8,Always say you'll take the old rubbish away free of charge (add £60 to original quote somewhere to cover this).
9,Add 4% to quote, then when you send invoice state a discount of 4% is offered if payment is received within 7 working days (i use this on larger jobs)
10,Never cut corners, or the bottom off post because you cant be arsed to dig the hole deeper.
11,Have a small portfolio of fence types (no prices) to show customers, can guarantee when they see closeboard 9 time out of 10 they will go for it.
12,Get the van sign written and don't just have a mobile or 0800 number (these put off potential customers, they think cowboy).
Remember a good quality job will lead to more work.
13,When you say you'll be there make sure you are (save time load the van the night before)
14,But most important of all, don't over do it always keep Sunday as a FAMILY day, because believe me the temptation to take on just one more job as it's small will end up with you working 7 days a week making her indoors a tad miffed (been there and done it) and the " I'm doing it for you & the family" routine wears thin after a while.
Hope that helps and good luck with your venture, it's a good line of work and has good profits if your any good at fencing and enjoy working outdoors (saying that I have to quote to put up chainlink inside a warehouse), it keeps me fit at the age of 40.