Upon Waking Up
"La 'ilaaha 'illallaahu wahduhu las shareeka lahu, lahul-mulku, wa lahul-hamdu wa Huwa 'alaa kulli shay'in Qadeer. Subhanallahi, walhamdu lillaahi, wa la hawla wa laa Quwwata 'illaa billaahil 'Aliyyil-'Adheem, Rabbighfirl ee"
There is none worthy of worship but Allah alone, Who has no partner. His is the dominion and to Him belongs all praise, and He is able to do all things. Glory be to Allah. There is none worthy of worship but Allah. Allah is the most Great. There is no might and no power except by Allah's leave, the Exalted, the Mighty. My Lord, forgive me.
Whoever says this will be forgiven, and if he supplicates Allah, his prayers will be answered; if he performs ablution and prays, his prayer will be accepted. Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 3/39, amond others. The wording here is from Ibn Majah 2/335
What To Say When Undressing
In the name of Allah
Invocation For Entering The Restroom
"[Bismillahi] Allahumma 'innee 'a'oothu bika minal-khubthi walkhabaa'ith"
Before entering: In The Name of Allah
Then: Oh Allah, I seek protection in You from the male and female unclean spirits
Invocation For Leaving The Restroom
I seek Your forgivness.
Invocation For Sitting Between The Two Prostrations
"Rabbighfir lee, Rabbighfir lee"
My Lord, forgive me. My Lord, forgive me
"Allahumm-maghfir lee, warhamnee, wahdineee, wajburnee, wa 'aafinee, warzuqnee, warfa 'nee"
O Allah, forgive me, have mercy on me, guide me, support me, protect me, provide for me, and elevate me
Invocation For Someone Who Says "May Allah Forgive You"
Invocation For Sneezing
When you sneeze, then say:
All praises and thanks are to Allah
Your companion should say:
May Allah have mercy upon you.
These are all taken out of Fortress of the Muslim(darussalam) Its really useful. And these are sooo easy to memorize. You just have to sit with a tasbih and not even half way through the tasbih, you will have it memorized