For PoB and PoS minting, all you need is the client to be on. For PoS, all you need are some amount of coins in your balance. For PoB, you have to burn some coins. Now, there are over 200000 coins burned, so for you to see some return, you will need to burn quite a bit. For example, burning 1000 coins will get you a 0.5% chance of landing a PoB block in the network. Given the network stabalizes to 1 PoB block every 3 PoW blocks and a PoW block is found at about every 90 seconds, that means about 320 PoB blocks per day. At 0.5%, that gives you 1 to 2 PoB blocks per day.