In games of Texas Hold'em the Blinds are the catalyst for what occurs in each and every hand. They exist simply to create action and how you play the blinds will have a big impact on your success, or otherwise, in Texas Hold'em. You need to give serious thought on how you approach your own blinds and those of your opponents.
Too many bad or inexperienced poker players get into trouble because they feel compelled to play in a hand once they've posted a blind. Unlike an ante, a blind is a live bet, which means anybody who has posted either the big or the small blind has contributed a stake towards the current round of betting. However, that shouldn't be used as an excuse to take part in hands when your two hole cards are not good enough to warrant you getting involved in the action.
You shouldn't tamely allow players to your right to repeatedly steal your blinds as a matter of course. You do though need to know when it is the right time to defend your blinds, or to seize the initiative when you become involved in the action.
If you routinely call other player's raises simply because you've already posted a blind then you're on the long term road to losing money. More often than not a player who raises will have a good hand and if you're calling that raise with a bad hand then you're at an immediate disadvantage, especially as you'll also be out of position in the betting rounds that follow.
The temptation to call comes from the fact that players already have some money invested in the pot and believe they're getting into the action cheaply by calling raises that have been made. It's a common mistake that's made by too many players and almost always leads to them losing far more on their blinds than they should do.
Given that there are times when you need to discourage blind stealing from late positions you need to pick your spot and act decisively when the time is right. Those who like to steal blinds are usually stopped dead in their tracks by a re-raise and it's a potent weapon to use if you have something like a high pair, or a powerful Ace with a good kicker.
Once you've showed that you're prepared to defend your blinds strongly and not just call up raises to try and get lucky on the flop, you'll find that those to your right will be less inclined to try out and out attempts to steal from you.