Introduction

There have been a number of articles written about Proof of Stake consensus, and how to earn rewards by staking your coins, voting and delegating to validators. So I will refer to some of those guides below. A good meta site for listing and ranking of various POS coins is at stakingrewards.com. I don't know if I agree with all of their rankings, but its a good place to start when deciding which coins to stake

Validators

The validators perform an important function on the proof of stake networks. If you dont want to invest in a lot of equipment and resources to become a validator, you can still participate by delegating, voting and staking. Sometimes there are minimums, but not usually. There are a lot of good resource guides, and educational material on the validator sites. Some of them also have good dashboards to monitor the rewards, or mobile wallets to manage the staking and claiming process

Here are some of the validators that I have personally used, and found them to be reliable.

Web based/desktop

Staked.us - good variety of coins​

Chorus.one - good blog, and article on Loom staking

Bitfish - reliable validator

Figment networks - good variety of coins

Cryptium labs - good info on their site

Stakewith.us - check their site

Mobile wallet based (they are also validators)

Cobo cloud wallet supports many coins including Loom, Atoms, IOST, and various others (see article that I wrote about cobo wallet on Publish0x)

Wetez - for Tezos, Cosmos, Iris

Best coins (my opinion)

Web based/desktop

Tezos - see guide on medium, or article here on Publish 0X

Loom - See guide here or medium article or validator site

Livepeer - See guide here or medium article or validator site

EOS - Use REX

Supported by mobile Wallet

Tezos - Wetex, Trust wallet (Binance)

Cosmos, IOST, Loom, Vechain, Ontology, IOTX, Decred, Dash - all can be handled with Cobo

Conclusion

It will be easier and more convenient if you manage the skaking, claiming, and re-staking process with a mobile wallet since there are usually less steps involved. But you will have to use Cobo/Wetez or Trust as the validator, so you won't have as much control. Don't just rely on the staking rewards yield %. There are other factors to consider like:

How reliable is the validator

Is it a good project that you believe in

Will it be around for the long term

Will it go up in value.

As usual, this is my opinion from my own evaluations and research, and is not investment advice. In future, we will probably be able to add etrherium to that list when they make the transition from proof of work to proof of stake.