I'd suggest forgetting about trends, and instead focusing on finding problems that lots of people will pay you to solve for them.

Here are some ways to get started:

(a) Have a clear idea of the few areas where you may have a view of what lies just beyond the edge (technology evolution, market needs, etc.)

(b) Identify problems that need to be solved, preferably using primary research (i.e. talking to people).

(c) Remember that sometimes people cannot easily articulate what the problem is, so understanding what the problem is might require some effort.

(d) Figure out if the problem is big/widespread enough that it is worth solving.

Am happy to talk if you'd like to brainstorm your early-stage venture ideas.