Hi Guilap,
The best way is to allow emails (usually an option within the poker lobby) from each of the platforms you play on and ensure that they are not blocked by your anti-spam software.
They will send you an email every time they are doing a special promotion or reload bonus etc.
I had one about the Stars Scoop a few weeks ago, but they're usually pretty good in that they don't spam you with loads of emails.
The PokerStrategy news page also reflects partner sites current promotions (not always reloads though), so also pays to keep in touch with PokerStrategy on a daily basis
Best regards,
Bart