In some plans the employer also makes contributions to the accounts, commonly referred to as «matching». (annuities.blueprintincome.com)
I've purchased equal dollar amount in these three stocks and plan to make small contributions to the account on a weekly basis. (allaboutinterest.com)
If you prefer, you can set up automatic investments from your checking account or make additional contributions to your account at any time. (gobankingrates.com)