When I was selling my work I always followed up on the bids I made. I had some high dollar jobs that took me months to finaly contact the client, only to have them say "Oh I've been wanting to talk to you forever! But I've never had the time!" One lady it took me over a year to get a hold of, but I closed a $1400, one day job. Think we got her on the annual shurb program too.
If you do not talk to them you have no way to sell yourself. Gotta explain your apples to the other guys lemons. A buddy I do a lot of work for had a recent sale where he was the high bidder, he called back, she asked "Why are you so much more?" "Quality work ma'am. I climb to the tips and thin the whole tree. Many cheeper companines will just trim out the inside of the tree, I work in the whole tree and do it...."
You get to read a persons attitude towards you. Do they want know what is being done? If you have a map and good feild notes you can talk about the specific plants and what they are doing, this is especialy usefull if you inventory the property and gave an itemized price more then they asked for a number of plants on the property, this that and the ther thing for x, y, and Z... or W if we did it all at once.
If you can increase your average job price by say $50 what would it do for you bottom line? or 150?