Always keep it professional. A client may not have a budget that works within your rates presently, but one day they may have a project with a much larger budget and think of you as the talent to circle back to! It never hurts to politely decline when a project has too low of a rate and exclaim, “I would love to work with you in the future when our rates align!”
I’m new to this so keep that in mind, but I use a cheap “dog training clicker” to mark my redo portions. They are very visible in the sound track. In longer recording sessions (where I won’t remember the error) I’m experimenting with using 1,2 or 3 clicks to indicate how far I plan to back up for the restart. I can often find and do the cut without have to play anything – that by having an idea of how far back I need to look.
You start off each job as a producer, consulting your client and getting briefed on the project at hand. Then you become an engineer, dealing with recording gear and software, setting the mic position and levels. Next, you step up to the mic as an actor, bringing the script off the page and connecting with the listener. Meanwhile, the director in you sits behind the metaphorical glass, making sure the actor doesn't mispronounce a word or stumble through a passage of text. Then you're an editor, cleaning up the best take and sending the resulting audio to your client. You need to be able to perform all of these roles to a high standard, and the better you are at each, the more your business will prosper.
"When recording voiceovers at home, you have to focus on performance: keep your energy levels up, stay true to the page, pronounce words correctly and consistently, and make sure you keep to a schedule to make the deadline. Prep well so you don't waste time second‑guessing yourself, looking up words as you go, and remember to not over‑ or under‑direct yourself. Also, make sure you know your recording equipment and room well; being able to quickly make adjustments to mic placement, levels, and so on, will make you more efficient.”
A demo recording of you doing voice-over work is your CV and your business card combined. If you're applying for a voice-over job, you can send the potential customer your demo via the Internet. Ideally you have multiple demos for different types of gigs. For commercials, clients want to hear 60 to 90 seconds of voice work. If you're auditioning as an audiobook reader, five minutes of demo proves that you can stay in character over a longer stretch of time.