Ibaadat and Good actions

Q: I think I'm a liar and a munaafiq because the lovers of Allah Ta'ala love to worship Allah Ta'ala. I sometimes get tired, lazy and there are days when I feel like I just want to relax and give it a break.

Many times it happens at tahajjud time where I do not want to get up, I have to force myself, and sitting from tahajjud to ishraaq is a very big problem.

How can I overcome this problem of laziness. Isn't the lovers of Allah Ta'ala cannot get enough of worshipping Allah Ta'ala? There are days I just want to sit and do nothing extra. How can I overcome this condition?

Q: If a person earns haraam money or eats food containing haraam then his dua is not accepted, does that include Quranic supplications or durood sharif sent upon Nabi (sallallahu alaihi wasallam)?

Q: If you accidentally or deliberately disrespect Rasulullah (sallallahu alaihi wasallam) because of personal circumstances, is all the good you did wiped off and worthless or is it still accepted?

Q: I like to do acts of kindness to my parents and siblings without any intention. Do I get any benefit or reward from it?

Q: What does it mean for believers to compete with each other to do more good deeds than others? Won't it result in showing off?

Q: What does it mean to compete in Deen and how can you do it with the right intention?

Q: I would like to know what Islam says about "good" people from other religions? How will they be questioned on the Day of Judgement? Are they expected to have completed the same duties as Muslims?

Q: I have a question about the Sahabi who only did the bare minimum and didn't do too many optional acts. When another Sahabi stayed at his house for 3 days he didn't notice anything special that he was doing. Despite this, Rasulullah (sallallahu alaihi wasallam) said he was a jannati. Other Sahaba always followed the azeemat and took the more difficult path. So, as a general rule, should I take the easy path or the hard path when I have to make a decision?

Q: My question is about intention in doing good deeds. I used to ask Allah for jannah just to get the things that I dont get here. Whenever I had any wish on things thats not permissible for us or luxurious life style that we wont get here I used to think inshallah I will get it in jannah and it also motivates me to do good deeds or pray in order to get jannah. Basically my intention while doing good deeds is to get jannah and these worldly adornments there. Are those deeds accepted or is it a sin for keeping such intention. 

Q: What is the condition for all ibaadat to be accepted?