The 3 principles of a successful lead magnet are...
1. Be valuable
2. Be digital
3. Be a natural first step of your sales process
If you cannot create just simply...
Curate.
Curate a list of books, videos, tools that will help and serve your audience.
It just has to be valuable.
Since you put the effort to create a lead magnet there is a last step for the ultimate success of it as a first step in your sales process.
Set expectations.
Setting expectations is what makes or breaks any relationship.
Let the leads know what to expect in terms of communication.
What, when and how often they will receive from you.
So...
Recap.
Valuable, digital and first step to your sales process.
Create or curate.
Set expectations of future communications.
Oh...
And do not do a hard pitch from the get go...