I'm 17, and have been mowing some of my neighbors lawns in my neighborhood for 3 years now. All 8 of them are very good clients who I am on a first name basis with, and do not use contracts. They pay on time, give tips, are very nice, etc. However I am charging $5-10 too little which is a lot. I am planing on becoming licensed and insured next year, and do not want to be a low baller or a scab any longer. What would be the best way to raise their rates without loosing them? A few dollars at a time, all at once, keep the same because they are very good clients, or what? Thanks for all your guys help.