The answer to all three is the same, build your leads. The more people you are connected to, the more people you can nudge into your sales or lead generation funnels.
Consistent Lead Generation is one key to growing a stress free business.
Imagine never having to worry over where you next lead, client or customer is coming from. This can be achieved by having a continuous traffic source you control. If you need more leads you turn the flow up, if you need less you turn it down.
2 Types of Lists
There are two types of lists you can build.
The first is your database, which is normally maintained using 3rd party software (eg Ontraport, Mail Chimp etc) You own this list, and can use it where and when you choose.
The second are your invisible lists. These are created on 3rd party platforms - the most common are Facebook and Google Adwords - and are called custom audiences. These lists are created using pixels on your website and custom audiences on the platform. These lists have limitations. They can only be used on the platform they were created on and significantly you do not own these lists and cannot see who is on them. The primary purpose of these lists is to improve your advertising targeting based on an individuals behaviour.
Traffic = Leads
Generating traffic is much easier than you think and is definitely not as hard as many would have you believe.
Google, Facebook, LinkedIn or YouTube (just to name the obvious) are all traffic stores and would love nothing more than to send you traffic. All you need to do is go to the traffic store of your choice and buy it.