Working with a top voiceover agency can bring you a steady stream of well paid work. The top voiceover agencies, like Hobsons in London or Abrams in NY and LA, have an elite set of voice actors as well as recognised visual actors who do voiceover. These top agencies are hard to get into though. They only take the very best established voice talent.
"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.”

It's a good idea to record with one ear free from your headphones, as this helps you to deliver a more natural performance.When recording solo, I find the role of director the hardest to play. How can you lose yourself in the moment if you're on the lookout for mistakes? If you stop each time you mispronounce a word or use the wrong intonation, your spoken‑word recording will sound choppy and unnatural. It's for this reason that I like to record each job twice. The first time, I push the director out of the room and focus on the message. If possible, I even let the soundtrack of the video I'm narrating play quietly in my headphones, and I don't stop for mistakes any more than I would if I were telling a story to a friend. During the second take, I let the director back into the room, to make sure I pronounce everything correctly and emphasise the correct information — though I still try to keep the performance honest and natural.

Important: Use headphones to check the audio quality of your test recording. Your computer speakers will not be good enough for this. Headphones allow you to listen closely to ensure clear audio. Obviously, you want the audio to sound good on even the cheapest speaker, but you will be much happier if you use headphones. Remember, a good portion of your video viewers will listen this way, so you want to be sure they’ll have an optimal experience.
In the ‘old days’ voice over actors used to walk into studios to record and there were three or four people behind the glass, you know, somebody keeping track of the script, a director; sound engineer…all these people cost money. Well, now all those people are just you, just one person in a room and so you have to learn to be a have full end to end production capabilities.
First, I like to listen to the entire voice over recording from start to finish. I may make notes here and there to remind myself of something I want to go back and edit, but this time through I really just want to concentrate on the overall pacing and tone of the recording. Does it sound like I hoped? Did I rush or speak too slowly? Did I flub any words, mumble, or misspeak? Are there weird silences or unknown sounds?
Even if you're mixing yourself, it's better to add EQ and compression only when you can hear how it will sit with the soundtrack or special effects. Ultimately, it comes down to knowing what your voice will be used for and making a judgement. For instance, if I'm recording a tagline for a TV or radio advert, I'll generally run a mic into a nice preamp (where I might add slight tube warmth, and subtle EQ or compression, just to give the recording a bit of 'body'), and I may do a little de‑essing using a plug‑in when performing any edits. However, for e‑learning jobs, corporate videos and so on, I'll tend not to add any creative processing while recording or editing, and will only use the de‑esser ever so slightly.