What is the best way to redirect a domain and keeping it indexed?

Hey,
I have this dilemma of which redirection/forwarding method to choose in order to keep my domain indexed.
The goal: I have a domain.com which I want to forward/redirect to a certain URL and I want the domain to be indexed on Google and save its SEO value.
Which method should I choose in order to achieve this goal?
The options I'm considering are:

301/302 redirection
Make an html page with <meta http-equiv="REFRESH" content="1.5; url=XXX ">
And type in body: "you are…

What is the best way to redirect a domain and keeping it indexed?

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