Give-away advice/tips. How to?

[It's Cowfoot]

Have a look at Gleam.io or something like that. It's a website the allow you to host contests and give people multiple ways to enter, such as: Subscribing your channel, watching one of your videos, following you on twitter and many other possibilities.
It's really recommended.

Thank you to everybody who contributed to the thread.
I ended up using this suggestion as I really like the concept!

I am unsure if I am allowed to promote the giveaway here on YTTalk, but if you want to participate, feel free to have a look at my channel for some free games!