A great friend of mine, Lindsey Borders, has her own booking agency for musical talent. I owed her more than one favor for all she has down for me and my own music, and decided that I could help her by designing a nice proposal template for her to use when approaching new venues, new clients, etc.
I chose to keep the design very subtle and unobtrusive, and for those of you who don't design you don't have any idea how much restraint it takes for us designers to keep things simple when we have as many tools in our box as we do. Picture a child who loves coloring and has a huge box of 150 crayons. Now challenge him to picking only three colors to use on the picture, and to not dump the whole box on the table during the selection process.
In essence I designed a letter head she could use, but added a cover to make it even more professional when submitting her proposals. I also designed her a very simple logo in the process, as well established a color pallet: a very warm and inviting pink with light browns.