The only tactic that I know of right now is approaching recently funded companies founders to get an introduction. Would you personally recommend anything that has worked for you?
Let's be clear that there are two types of angel investors: Experienced angel investors (they have invested in 5+ startups) and people with money who *might* invest in you and your startup.
Generally speaking, you should focus your time in getting meetings with experienced angel investors, as they generally follow clear protocols, whereas the other group are highly unpredictable.
Whichever group you choose, you ought to filter based on relevancy. Approaching someone whose entire experience has been with games, as an example, and thinking they're going to get excited by a marketplace for construction materials is a stretch.
I've found that the more someone can understand the need for the product, the more likely they are to invest.
People really don't ever want to be "pitched" They want to build a relationship with someone who they believe in, who they feel they have helped and can continue to help become incredibly successful. So starting with asking for advice is usually a great way to commence a relationship. But of course, you must be genuine in your respect for that advice.