Green screen

As already mentioned get your lighting as even as possible across your green-screen.

Lighting, lighting, lighting - this is critical to good keys - can't be emphasised enough!

Also a larger green-screen area is preferable as it will allow you to stand further away from the screen. The advantage in this is less 'green-spill' on you - and makes for a better key.

Pop-out or foldable screen are common and usually good (bigger is better), as are larger frame mounted screens. Some will come in both green and blue. Useful to have the option. 

I have been able to use several green screen options; just make sure you light the background well and provide hair lighting from behind to your subject (preventing green from spilling into the subject's hair). I've used popup/foldable, hanging green material, and retractable Elgato screens -- they all work well as long as you're lighting the subject and background well. Use the keying options in Premiere to knock it out well.

Solo necesitar tener una buena iluminacion. Con ello lo demas es facil.

Salu2