Steps:

1) You ideally wnat all your coins in one address - this is more of a housekeeping issue.
2) Enable coin control
3) Select all your coins and send to your own main receiving address ie. send them to yourself

All your coins will now be in one block and in one address and staking after they mature. Only do this combination once. When you get stakes, the coins that stake will be added to the reward and the result split in 2. Then you have 2 input blocks staking. Leave them like that to keep on splitting and stake independently for the reasons explained in my quote above. Only when the input blocks become small (maybe 20 or so) can you go back to step one and combine them in a number of sizable blocks. With 250 blocks for confirmation of newly minted coins, it is in the interest of the network if everyone has many smaller sized input blocks.