What are the Buddhist teachings on how best to live a married life? Does Buddhism describe how best to live a married life? Please provide some short excerpts. Thank you.
The Access to Insight website has a number of related translations and essays;
Suttas

How to ensure that you'll be with your spouse in future lives: AN 4.55
Spouses' duties to each other: DN 31

Essays

&quot;A Single Mind&quot; (Fuang)
A Happy Married Life: A Buddhist Perspective (Dhammananda)
Nothing Higher to Live For (Nyanasobhano)
Buddhism and Sex (Walshe)

It all seems to boil down to &quot;be ethical&quot;. Although on the other hand ideally one would not get married, but would take up celibacy and reject family life. For example in the Cūḷahatthipadopama Sutta the Buddha says:

so tena saddhāpaṭilābhena samannāgato iti paṭisañcikkhati — ‘sambādho gharāvāso rajopatho, abbhokāso pabbajjā. nayidaṃ sukaraṃ agāraṃ ajjhāvasatā ekantaparipuṇṇaṃ ekantaparisuddhaṃ saṅkhalikhitaṃ brahmacariyaṃ carituṃ. [MN 27; i.179
And having become possessed of faith [from hearing the dhamma] he thinks: household life is crowed and dirty; having gone forth one is wide open. It is not easy to live the religious life, so perfect and pure like a polished shell, while living in a home.

In short the best way to do marriage, is not to do it all, but to dedicate yourself to practising the Dharma.
This question is similar to a previous one:
What does a traditional Buddhist wedding look like?