Most people already have more than enough mental power in terms of the mind skills they've developed during their lifetime to enable them to achieve success in almost any way they desire!
Unfortunately most don't know that they've actually got these amazing mind powers partly because they think they are just ordinary people.
OK, a tiny minority do have exceptional skills in sport or science or singing without which they couldn't have been so successful in the particular field they've chosen.

But you can be absolutely sure that even if they had twice as much natural talent they wouldn't have succeeded without applying focus and concentration techniques to develop their skills and talents to make them ‘marketable'.

If they had shown exceptional natural talent when you're young, often their parents would encourage or even drive them to build on what they had. Later on people such as coaches and agents would keep their nose to the grindstone.

In this way others would be handling the concentration aspect of success by continually chasing, encouraging, even bullying as normal concentration levels are generally too low.

Other people have a lot of personal drive and ambition so even if they are not especially good in any particular area, their concentration on success can enable them to run with whatever they've got however ordinary that may be.

In fact many top TV presenters are fantastically successful because their audiences feel that they are just ordinary people like themselves!
The first step towards achieving success is realism. If you've only got average sports or singing or acting abilities, it's no good believing that mental concentration alone will get you to the top.
The old chestnut about aiming high because you'll still end up with something worth having even if you fall short is an unnecessarily high risk strategy!
If you adopt realism as a guiding principle, which I recommend 100%, then you will soon realise that the most practical way forward is to identify what mental skills you have and then to concentrate your mind on employing these to produce the maximum benefit for yourself.
Always keep in mind that you can beabsolutely certainthat you really do have all mental abilities that you need to achieve the success that youtruly desireandgenuinely deserve!
But never forget that to get what you want requires high levels of focus and concentration.