To write out a bid, you are actually writing out a quote. You are going to put down a description of all the work and the cost. Make sure you cover everything as far as how many trees, what you're doing, disposal, etc. Make sure your name, address, and phone number is on it along with who you are giving the quote to as far as name and the address where you'll be doing the work. Also, put on the bottom how long the quote is good for. You don't want them coming back in a year and holding you to an old quote. 30 days would be sufficient and also date the quote.