There is no worse feeling than dying with cards on your hand only because you are missing a color
Keeping your hand full after a brutal combat step or a board wipe is a great way to help you recover, but since its not a 'may' affect, be careful not to get your life total too low
Mana acceleration Avacyns Pilgrim, Heronblade Elite, Gyre Sage, and Somberwald Sage buff our mana supply to get a head start, also the Knight of the White Orchid when played tactically
Here we see Clive become Ifrit, fighting an opposing creature and then making you loads of mana
Alternatively, when paired with a large enough board state, an Altar of Dementia is capable of milling the remainder of an opponent's library, causing that player to lose the game the next time they'd draw a card