@Juan Rubio Preparation and practice!
In no particular order
1. Have a set number of calls that you are committed to making each day. A daily goal will help you remain accountable and give you a lot of practice to refine your skills.
2. Keep a sales journal. Make a list of all of the objections that you are receiving. Write down the objections, write responses to these objections. The better prepared you are to overcome an objection, the more confident you will be on the phone.
3. Know your value inside and out! Be able to clearly communicate what you are trying to do and why they should want to do it with you, also known as a value proposition. (Practice your value proposition a lot. The more you practice the more articulate and confident you will be on the phone)
4. Sales is a numbers game - Lots of stats out there but something in the range of 7-12 sales attempts before a deal starts to take off. Be professional and persistent. A lot of your competition will quit after the 1st or 2nd "no"