There are some administrative issues to take care off. Normally, your DP debits annual AMC charges to your bank account. Ensure that your bank account is adequately funded. When you sell shares in online trading or offline trading, first check that you have adequate balance to avoid the embarrassment auctions later on. Keep a solid audit trail of your transactions. When you sell shares to ensure that shares are debited on a T+1 date and when you buy shares to ensure that you get the credit in your demat account on a T+2 date. Above all, make it a point to regularly download your demat statement and reconcile with your trading ledger. These basic checks and balances can go a long way in making your demat experience a lot richer.