A very important aspect of socializing is to respect your friends from the social networks. This is like an unwritten rule that you should know.
When I said that you should respect them I didn’t mean that you should treat them with “hello sir”. From time to time, take a look at your friend’s profile, especially at his favorites and if you like what you see, vote / comment!
The how many friends you have number is insignificant if you don’t have a good relationship with that friends. Don’t understand that I promote the votes exchange. No way, but I consider normal to check out your friend’s profile from time to time to see what are his new discoveries. If he will see that you are interested in his profile, then, he’ll check yours too.
It’s just like in real life ( I like to make comparisons between blogging and real life because is easier for you to understand what I mean ). If you have a very good friend but you won’t give him a call anymore to ask what’s new or something and if you don’t appear to be interested about him, that friend may get upset and you will have a surprise. Same thing here on the social networks.