Best Tools for Lead Generation and Data Sourcing in GTM

Hi, i'm really enjoying this community and the feedback i've been getting so far and would want to ask something else 😊. This GTM journey is ALOT to learn (with vast amount of tools out there) to elevate data sourcing and campaign execution. Would love to know from everyone here any tools used for gettings leads into clay, like data scraping methods, Apollo, etc. I'm just trying to cram all of this GTM stuff lol