Best way is to just take pride in your work. Make sure to just do the job right and efficiently. If it takes an extra day or two to pay attention to detail and make it look good while making sure it’s done right well the clients will see that and that right there is self marketing. They tell their friends n so forth. Next thing you know you won’t be able to keep up with the jobs coming in and will need to hire lol plus it’s the right thing to do. People spend good money so give them what they deserve. Sometimes it hits ya in the pockets but trust me it’s well worth it in the long run.