First, don't express everything you think. Especially when evaluating the leading colleagues of a company or unit, remember not to be too absolute. Set aside four to five minutes when you speak. When you judge anyone, you should speak well of him and never speak ill of others. Basically, everything you say to your colleagues will get out, so you have to say something nice about others so that you won't be hated by others.
Secondly, when a colleague asks you for help, I think you should keep a three-component force when you can help, that is, delay it, so that he feels that you are really helping him, not that you are perfunctory. People think you really tried your best, but whether you tried your best or not, you should grasp it yourself, don't push too hard, or others will ask you for help in the future. If you can't do your own work well, it's no use doing someone else's work well, so you must put it off when you ask for help, and then. Try not to overcook it. It's enough to leave a little, which makes people feel that you have done your best. If you are really busy, you should know how to refuse.
Third, don't pull their beat between colleagues. Abuse of power for personal gain is the most taboo of every unit. You are the leader, and he will try his best to give you a little shoes to wear, because doing so will definitely endanger his position, so you must listen to him, so don't be crony in this case.
Personally, I think the above three points are taboo for colleagues to get along with. Be careful not to bring problems to your work because of these things.