In order to make any sort of impact in sales jobs you need to make sure that you are doing a number of things. Jobs in sales can be demanding at times but for those that can do it, the following tips should be pretty easy to act on, and as long as you have initiative and are extremely creative, you should be able to succeed where others have failed in sales jobs.
The first thing of course, is if you make a promise, make sure that you keep it. That being said, don't make ridiculous promises that you know aren't going to be attainable or even viable. For example, don't tell them that you are going to be able to increase their sales by 100% even if you know you can. If you make this promise and then fail to deliver on it then you will endanger the relationship with your client and may even find your contract terminated.
Make sure that you know the products you are selling, and make sure that you know them well. If it looks like you don't know what you're doing for even a minute you're going to be in trouble, as your client will lose confidence in you. Yes, sales jobs involve a lot of research, and you will have to learn all the ins and outs of each product but this is part of turning jobs in sales into sales careers, and a big part of establishing yourself in this competitive niche.
If you make an appointment, keep it. No matter what happens make sure you show up on time, otherwise the client will lose confidence in you, and some clients might dismiss you based on that one failure to show. If you fail to keep your commitments then the customer might believe that you are taking them for granted and no one ever wants to be taken for granted.
Show interest in the company. You can do this by constantly checking in with them to see what's going on in the company. By doing this you will show them that you are dependable and that you will be able to show up at a moment's notice.
Doing these things in sales jobs will boost your popularity in the industry and more companies will request your services. It also looks great on your resume when you fill in your references section. Remember, in sales careers reputation is everything, so start building yours right now! No one ever said that it was going to be easy, but being the best in sales jobs means that you can make the best commission, and if you enjoy your job then the next best thing would be financial freedom, which it will certainly feel like when you're making more money than you ever dreamt of!